777 engine incidents - page 2 of 2

777 Engine Failures from January 2003 to August 2005. Internal components (external parts i.e. sensors, bleeds, etc excepted).

SDR query source; search word - “engine”.

2003UALA00283 (b) Difficulty Date   03/17/2003 (c) Registration Number   219UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7261 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   CRUISE (CR)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   OVER TEMP (M)
  OVER TEMP (J)
BOEING 777222 30551 8824 1171 (e) Precautionary Procedure   ENGINE SHUTDOWN (E)   (A) (c) Engine PWA PW4090 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description AIRCRAFT RECEIVED NR 2 ENGINE HIGH OIL TEMP AND LOW OIL PRESSURE INDICATIONS. REMOVED AND REPLACED ENGINE 222142. SHOP TEARDOWN REVEALED FAILURE OF THE NR 1 BEARING. CAGE FRACTURED OVER AN ARC OF 180 DEGREES. OUTER RACE SEVERELY SPALLED 360 DEGREES ON THE AFT PORTION OF THE RACE.

DL777030286 (b) Difficulty Date 03/25/2003 (c) Registration Number 861DA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7200 (a) Operator Designator DALA Operator Type Air Carrier (A) (b) When Discovered TAKEOFF (TO) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition VIBRATION/BUFFET (E)
BOEING 777232 29952 14948 3130 (e) Precautionary Procedure ABORTED TAKEOFF (C) (c) Engine RROYCE RB211TRENT89 051175 10552 1990 (f) FAA Region SO (g) Dist.Off. 27 (d) Propeller 4. Problem Description NR 1 ENGINE VIBRATION. FOUND A SPACER MISSING BETWEEN 2 FAN BLADES, DAMAGED TO ACOUSTIC LINER, BOTH FAN AND THRUST REVERSER LINERS. REPLACED PARTS AND REPAIRED DAMAGE.

DL777030342 (b) Difficulty Date   04/07/2003 (c) Registration Number   866DA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7200 (a) Operator Designator   DALA Operator Type Air Carrier (A) (b) When Discovered   CLIMB (CL)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   VIBRATION/BUFFET (E)
  VIBRATION/BUFFET (R)
  VIBRATION/BUFFET (J) BOEING 777232 29738 13903 2747 (e) Precautionary Procedure   UNSCHED LANDING (A)   (c) Engine RROYCE RB211TRENT89 051188 11957 2168 (f) FAA Region   SO     (g) Dist.Off.   27 (d) Propeller 4. Problem Description ATB-NR 1 ENGINE VIBRATES N2 5.0 AND COMPRESSOR STALL. METAL FOUND IN TAILPIPE ON ARRIVAL IN MAN.

DL777030359 (b) Difficulty Date   04/07/2003 (c) Registration Number   866DA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7200 (a) Operator Designator   DALA Operator Type Air Carrier (A) (b) When Discovered   CLIMB (CL)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   PARTIAL RPM/PWR LOSS (R)
  PARTIAL RPM/PWR LOSS (J)
BOEING 777232 29738 13903 2747 (e) Precautionary Procedure   UNSCHED LANDING (A)   (c) Engine RROYCE RB211TRENT89 51188 13978 2758 (f) FAA Region   SO     (g) Dist.Off.   27 (d) Propeller 4. Problem Description LT ENGINE VIBRATION WENT TO 5.0 ON CLIMBOUT ACCOMPLISHED BY ENGINE SURGE STALL. RETURNED TO MAN NOTICEABLE AIRFRAME BUFFETING OPERATED ENG AT IDLE TO NO OTHER ABNORMAL INDICATIONS. REPLACED NBR 1 ENG PER ROUTINE CARD DECK

2003UALA00469 (b) Difficulty Date   06/04/2003 (c) Registration Number   778UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7930 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   CLIMB (CL)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777222 26940 28658 5552 (e) Precautionary Procedure   ENGINE SHUTDOWN (E)   (J) (A) (c) Engine PWA PW4077 777023 29354 5756 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description RETURN TO FIELD AFTER RECEIVING LOW OIL QUANTITY INDICATION FOLLOWED BY LOW OIL PRESSURE INDICATION ON NR 1 ENGINE. NR 3 BEARING EXTERNAL SCAVENGE LINE FAILED (LR04) LEAKAGE WAS DUE TO CRACKING OF THE INTERNAL PTFE (POLYTETRAFLUOROETHYLENE) LINER. THIS LEAD TO OIL PRESSURE BUILDUP UNDER THE FIRESLEEVE, WHICH EVENTUALLY BURST. NO EVIDENCE WAS FOUND OF DAMAGE TO THE WIRE BRAID. (CORROSION, KINKS, ETC.)

2003UALA00539 (b) Difficulty Date 07/06/2003 (c) Registration Number 774UA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7930 (a) Operator Designator UALA Operator Type Air Carrier (A) (b) When Discovered NOT REPORTED (NR) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition WARNING INDICATION (J)
BOEING 777222 26936 30521 6709 (e) Precautionary Procedure ENGINE SHUTDOWN (E) (J) (A) (c) Engine PWA PW4077 (f) FAA Region WP (g) Dist.Off. 29 (d) Propeller 4. Problem Description LOST LEFT OIL QUANTITY AND PRESSURE. ENGINE SHUTDOWN. THE MAIN GEARBOX IDLER SHAFT BEARING FAILED AT ITS INNER RACE. CONFIGURATION WAS POST SB PW4G-112-72-149. THIS SB WAS INTRODUCED TO PREVENT SPINNING OF THE SPUR GEAR ON THE OUTER RACE. FAILURE OF THE INNER RACE ALLOWED THE REMAINDER OF THE BEARING AND SPUR GEAR TO SPIN ON THE IDLER SHAFT. THEREFORE, DRIVE TORQUE TO THE DE-OILER WAS LOST. THIS RESULTED IN OIL EXITING THE ENGINE THROUGH THE OVERBOARD BREATHER PORT.

2003UALA00552 (b) Difficulty Date 07/11/2003 (c) Registration Number 769UA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7261 (a) Operator Designator UALA Operator Type Air Carrier (A) (b) When Discovered CLIMB (CL) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition WARNING INDICATION (J)
BOEING 777222 26921 32257 6386 (e) Precautionary Procedure UNSCHED LANDING (A) (c) Engine PWA PW4077 777053 24650 4792 (f) FAA Region WP (g) Dist.Off. 29 (d) Propeller 4. Problem Description RETURN TO FIELD DUE TO NR 1 ENGINE OIL TEMP. INDICATED OVER TEMP. THE TUBE-TO-BOSS ADAPTER, WHICH SECURES THE 12TH STAGE AIR COOLING LINE FROM THE NR 3 BEARING BUFFER AIR COOLER WAS FOUND CRACKED. THIS FAILURE RESULTED IN LOSS OF 12TH STAGE COOLING AIR FROM THE BUFFER AIR COOLER TO THE NO. 3 BEARING COMPARTMENT. THIS IS A "FIRST-OF-KIND" FAILURE.

DL777031138 (b) Difficulty Date   12/26/2003 (c) Registration Number   863DA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7261 (a) Operator Designator   DALA Operator Type Air Carrier (A) (b) When Discovered   CRUISE (CR)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777232 29735 16375 2833 (e) Precautionary Procedure   OTHER (O)   (c) Engine RROYCE RB211TRENT76 051399 5653 906 (f) FAA Region   SO     (g) Dist.Off.   27 (d) Propeller 4. Problem Description EXCESSIVE OIL CONSUMPTION LEFT ENGINE DUE TO REPORT OF LEFT ENGINE HOC AND AT ROLLS ROYCE RECOMMENDATION, REPLACE THE LEFT ENGINE.

2004UALA00003 (b) Difficulty Date 01/05/2004 (c) Registration Number 220UA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7230 (a) Operator Designator UALA Operator Type Air Carrier (A) (b) When Discovered NOT REPORTED (NR) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition VIBRATION/BUFFET (E)
BOEING 777222 30223 10333 1467 (e) Precautionary Procedure UNSCHED LANDING (A) (c) Engine PWA PW4090 222149 10333 1467 (f) FAA Region WP (g) Dist.Off. 29 (d) Propeller 4. Problem Description HIGH ENGINE VIBRATION ON NR 1. ENGINE CONDITION MONITORING DETECTED HIGH N1 FREQUENCY VIBRATION ON ALL 3 ACCELEROMETERS, ACCOMPANIED BY DOWNWARD SHIFT IN EGT MARGIN. CONSEQUENTLY, IMPENDING ENGINE FAILURE WAS SUSPECTED. THE EGT LOSS WAS SUBSEQUENTLY DETERMINED TO BE THE 2.5 BLEED NOT CLOSING FIRMLY & CONSISTENTLY ON TAKEOFF. THE VIBRATION WAS DETERMINED TO BE THE RESULT OF AN UNEVEN DISTRIBUTION OF DEICING FLUID AROUND FAN BLADE ROOTS. THIS PATTERN OF SHARP VIBRATION INCREASE, AND SUBSEQUENT RECOVERY, HAS BEEN SEEN BEFORE AFTER TAKEOFFS IN ICING CONDITIONS, BUT NEVER BEFORE AT SUCH HIGH VALUES.

2004UALA00008 (b) Difficulty Date   01/06/2004 (c) Registration Number   767UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7200 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   CRUISE (CR)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   ENGINE FLAMEOUT (X)
  ENGINE FLAMEOUT (J)
BOEING 777222 26918 35134 6851 (e) Precautionary Procedure   UNSCHED LANDING (A)   (c) Engine PWA PW4077 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description NR 1 ENGINE FLAMEOUT IN FLIGHT. CREW UNABLE TO RESTART ON 2 ATTEMPTS. FUEL PUMP MAIN STAGE FAILURE. IMPLEMENTING SOFT TIME THRESHOLD FOR OVERHAUL OF PUMPS AT SHOP VISIT. REMOVING HIGH-TIME PUMPS IN-SERVICE. TEARDOWN FINDINGS WILL BE ANALYZED TO DETERMINE IF HARD TIME LIMIT, IN ADDITION TO SOFT TIME THRESHOLD, IS ALSO REQUIRED.

CALA0400005 (b) Difficulty Date   01/06/2004 (c) Registration Number   78004 (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   8011 (a) Operator Designator   CALA Operator Type Air Carrier (A) (b) When Discovered   CRUISE (CR)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777224 27580 23096 2727 (e) Precautionary Procedure   ENGINE SHUTDOWN (E)   (A) (c) Engine GE GE9090B 900229 21198 2611 (f) FAA Region   SW     (g) Dist.Off.   27 (d) Propeller 4. Problem Description THE NR 1 ENGINE OIL QUANTITY AND PRESSURE BEGAN TO DECREASE DURING CRUISE. THE ENGINE WAS SHUTDOWN AS A PRECAUTIONARY MEASURE AND THE AIRCRAFT WAS DIVERTED WHERE IT LANDED WITHOUT INCIDENT. THE STARTER SIGHT GLASS HOUSING WAS FOUND SHEARED. THE NR 1 ENGINE STARTER WAS REMOVED AND REPLACED AND OPERATIONAL CHECKS WERE GOOD.

AALA20040299 (b) Difficulty Date 02/22/2004 (c) Registration Number 782AN (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7230 (a) Operator Designator AALA Operator Type Air Carrier (A) (b) When Discovered CLIMB (CL) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition PARTIAL RPM/PWR LOSS (R)
BOEING 777223 30003 (e) Precautionary Procedure UNSCHED LANDING (A) (c) Engine RROYCE RB211TRENT89 51238 (f) FAA Region SW (g) Dist.Off. 21 (d) Propeller 4. Problem Description JFK - INFLIGHT T0167/22 AT 175K LEFT HAND ENGINE COMPRESSOR STALLED WITH LOUD BANG AND AIRCRAFT YAW. FIVE SECONDS LATER SECOND COMPRESSOR STALL AND ENGINE STARTED TO ROLL BACK. ENGINE THRUST LEFT APPEARED MOMENTARILY. THROTTLE REDUCED AND STALL CLEARED. THE ENGINE THEN RAN NORMALLY. RETURNED TO JFK AND LANDED WITHOUT INCIDENT. REPLACED LEFT ENGINE IN ACCORDANCE WITH WORKCARD 71-94-05 AND ACCOMPLISHED ENGINE CHANGE RUN-UP PER WORKCARD 71-95-19. SYSTEM GROUND CHECKED NORMAL OPERATION.

2004UALA00175 (b) Difficulty Date   02/28/2004 (c) Registration Number   799UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7200 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   DESCENT (DE)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   OVER TEMP (M)
  OVER TEMP (J)
BOEING 777222 26926 25902 4032 (e) Precautionary Procedure   ENGINE SHUTDOWN (E)   (c) Engine PWA PW4090 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description RIGHT ENGINE OIL TEMP TO 145C AND OIL PRESSURE DROPPED TO 40-45 PSI TOP OF DESCENT INTO KIX. SHUT DOWN ENGINE. NR 1 BEARING FAILURE. THIS IS THE MAIN THRUST BALL BEARING SUPPORTING THE N1 ROTOR. OUTER RACE HEAVILY SPALLED THROUGH 100¡ ARC. ONE BALL HEAVILY SPALLED; ALL OTHERS, LIGHT-MODERATE SPALLING. CAGE FRACTURED AXIALLY THROUGH ONE BALL POCKET. NO SPALLING ON INNER RACES. BEARING IS PRE PRATT & WHITNEY SERVICE BULLETIN PW4G-112-72-212 PART NUMBER. BEARING WILL BE REPLACED WITH POST SB-212 PN WHICH HAS INCREASED DURABILITY. NOTE: ENGINE THRUST BALANCE SYSTEM WAS CONFIRMED TO BE FUNCTIONING NORMALLY.

2004UALA00269 (b) Difficulty Date 03/19/2004 (c) Registration Number 783UA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7230 (a) Operator Designator UALA Operator Type Air Carrier (A) (b) When Discovered CRUISE (CR) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition PARTIAL RPM/PWR LOSS (R)
BOEING 777222 26950 31309 4809 (e) Precautionary Procedure UNSCHED LANDING (A) (c) Engine PWA PW4090 (f) FAA Region WP (g) Dist.Off. 29 (d) Propeller 4. Problem Description NR 2 ENGINE COMPRESSOR STALLED IN CRUISE. POWER REDUCED TO IDLE. THE 6TH STAGE HPC INNER SHROUD ASSEMBLIES (PW IPC 72-35-00-17-001/-010) WERE FOUND TO HAVE BEEN INSTALLED BACKWARDS. THIS ALLOWED THE SEAL LAND TO MAKE INTERMITTENT CONTACT WITH THE TRAILING EDGE OF ALL OF THE 6TH STAGE BLADES NEAR THE AIRFOIL ROOT. A CRACK STARTED IN THE TRAILING EDGE OF ONE OF THESE BLADES, AND PROGRESSED IN FATIGUE TO THE AIRFOIL MID-CHORD. AT THAT POINT, THE REMAINDER OF THE BLADE FAILED IN STRESS RUPTURE. ALL 6TH STAGE BLADES, AND ALL OTHER HPC BLADES DOWNSTREAM OF THE 6TH STAGE, SUFFERED HEAVY RESULTANT DAMAGE.

2004UALA00406 (b) Difficulty Date 04/27/2004 (c) Registration Number 773UA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7200 (a) Operator Designator UALA Operator Type Air Carrier (A) (b) When Discovered NOT REPORTED (NR) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition VIBRATION/BUFFET (E)
BOEING 777222 26929 34736 7681 (e) Precautionary Procedure DUMP FUEL (J) (A) (c) Engine PWA PW4077 (f) FAA Region WP (g) Dist.Off. 29 (d) Propeller 4. Problem Description NR 1 ENGINE N1 VIBRATIONS. 6TH STAGE TURBINE AIRSEAL FAILURE REF: PW4074/77 IPC (PN 51A346) 72-53-00 FIGURE 7, ITEM 70A. A 4-INCH AXIAL BY 6-INCH CIRCUMFERENTIAL PIECE OF THE SEAL HAD BROKEN OUT & WAS MISSING. THE REMAINDER OF THE LPT SUFFERED HEAVY DOWNSTREAM DAMAGE. THE SEAL WAS OF THE POST SERVICE BULLETIN PW4G-112-72-171 CONFIGURATION. THIS IS A NEW FAILURE MODE. THE 2ND SUCH FAILURE UA HAS SEEN. SEALS FROM BOTH FAILURES HAVE BEEN RETURNED TO PW & MTU FOR ROOT CAUSE ANALYSIS.

AALA20040552 (b) Difficulty Date   05/13/2004 (c) Registration Number   791AN (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7260 (a) Operator Designator   AALA Operator Type Air Carrier (A) (b) When Discovered   CRUISE (CR)       (c) How Visual (V) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777223 30254 (e) Precautionary Procedure   UNSCHED LANDING (A)   (c) Engine RROYCE RB211TRENT89 51244 (f) FAA Region   SW     (g) Dist.Off.   21 (d) Propeller 4. Problem Description FRA INFLIGHT T071/13, THREE HOURS INTO FLIGHT STATUS MESSAGE DISPLAYED WITH RT ENGINE N3 READING 0 OIL QUANTITY AND RT ENGINE OIL PRESSURE STARTED DROPPING. CREW SHUT DOWN RT ENGINE AND DIVERTED. LANDED OVERWEIGHT AND WITHOUT INCIDENT. SINGLE ENGINE TIME APPROXIMATELY ONE HOUR. ACCOMPLISHED OVERWEIGHT LANDING INSPECTION. REPLACED RT ENGINE GEAR BOX. SYSTEM GROUND CHECKED NORMAL OPERATION. (CLOSED)

2004UALA00601 (b) Difficulty Date   06/21/2004 (c) Registration Number   791UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7261 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   CRUISE (CR)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777222 26933 30210 4721 (e) Precautionary Procedure   ENGINE SHUTDOWN (E)   (A) (c) Engine PWA PW4090 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description NR 1 ENGINE SHUT DOWN DUE TO LOSS OF OIL QUANTITY/PRESSURE. NR 2 BEARING FAILED. THIS IS THE MAIN THRUST BEARING SUPPORTING THE N2 ROTOR. BEARING CAGE IS FRACTURED. ALL BALLS ARE HEAVILY SPALLED AND "SQUARED OFF". OUTER RACE RIVET PIN STILL INSTALLED. OUTER RACE HAS NOT SPUN. CRACK IN THE SUPPORT THROUGH ONE OF THE RIVET PIN HOLES, ADJACENT TO THE RIVET PIN. INNER RACE HALVES ARE FRICTION WELDED TOGETHER. NR 2 REAR CARBON SEAL (C/S) DISTRESSED. PINS BENT. OIL RESIDUE ON REAR SIDE OF SUPPORT. NR 2 FRONT C/S, NR 1 C/S, AND NR 1 & 1.5 BEARINGS IN FAIRLY GOOD CONDITION.

2004UALA00657 (b) Difficulty Date   07/12/2004 (c) Registration Number   776UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7930 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   NOT REPORTED (NR)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777222 26937 33689 6556 (e) Precautionary Procedure   DUMP FUEL (J)   (A) (c) Engine PWA PW4077 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description ACARS'D AIRCRAFT HAD LOST NR 2 OIL PRESSURE. NR 2 ENGINE WAS REPLACED AT LAX. TEARDOWN REVEALED THAT THE LUBRICATION & SCAVENGE OIL PUMP HAD SEIZED AS A RESULT OF METAL CHIPS JAMMING THE GEARS. CHIPS WERE FROM A KEYWASHER IN THE ANGLE GEARBOX. HOWEVER, THESE CHIPS WERE NOT FROM THE CURRENTLY INSTALLED ANGLE GEARBOX, BUT FROM ONE WHICH HAD BEEN ON-WING REPLACED BACK IN JANUARY. APPARENTLY, SOME DEBRIS FROM THE JANUARY REMOVAL WAS NOT RETRIEVED, AND EVENTUALLY MIGRATED INTO THE PUMP, RESULTING IN ITS SEIZURE. MIS CLEANUP REQUIREMENTS ARE BEING REVISED TO REQUIRE A MAIN GEARBOX SCAVENGE SCREEN CHECK FOLLOWING ANGLE GEARBOX REPLACEMENT.

AALA20049060 (b) Difficulty Date 09/13/2004 (c) Registration Number 789AN (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7200 (a) Operator Designator AALA Operator Type Air Carrier (A) (b) When Discovered CLIMB (CL) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition WARNING INDICATION (J)
BOEING 777223 30252 (e) Precautionary Procedure ENGINE SHUTDOWN (E) (A) (c) Engine RROYCE RB211TRENT89 51213 (f) FAA Region SW (g) Dist.Off. 21 (d) Propeller 4. Problem Description ON CLIMB PASSING 12,000 A LOUD NOISE WAS HEARD FOLLOWED BY AN IMMEDIATE ROLLBACK ON THE RT ENGINE. SHORTLY THEREAFTER WERE INDICATIONS OF FIRE. THE LIGHT WENT OUT ALMOST IMMEDIATELY AS THE CHECKLIST WAS RUN. RETURNED TO BOS. TROUBLESHOOTING IN PROGRESS. REPLACED NUMBER TWO ENGINE DUE TO COMPRESSOR STALL AT 12000 FT. CLOSED.

2004UALA00840 (b) Difficulty Date   09/14/2004 (c) Registration Number   795UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7200 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   CLIMB (CL)       (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (E)
  FLUID LOSS (J) BOEING 777222 26927 30139 4648 (e) Precautionary Procedure   ENGINE SHUTDOWN (E)   (J) (A) (c) Engine PWA PW4090 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description LOSS OF OIL PRESSURE IN NR 2 ENGINE AND ENGINE VIBRATION. MAINTENANCE FOUND METAL ON THE MASTER & NR 4 BEARING CHIP DETECTORS, & METAL IN THE TAILPIPE. THE ENGINE WAS REPLACED IN SEA. TEARDOWN REVEALED THE THRUST BALANCE CAVITY ROTATING OUTER SEAL CAUGHT FIRE & BURNED AWAY. SUBSEQUENT HEAT DISTRESS LIBERATED LARGE CHUNKS OF BOTH THE STATIC & ROTATING THRUST BALANCE CAVITY OUTER SEALS. SLIGHTLY OVER 7 LBS. OF MATERIAL CENTRIFUGED OUTWARD INTO ROTOR, CREATING APPROX 2100 OZ-IN OF UNBALANCE & THE RESULTANT HIGH VIBRATION. RESULTANT DAMAGE TO NR 4 BEARING, & ITS CARBON SEALS ACCOUNTED FOR OIL LOSS. ROOT CAUSE FOR FIRE IS UNDER PWA INVESTIGATION & WILL TAKE SEVERAL MONTHS.

2004UALA00846 (b) Difficulty Date   09/18/2004 (c) Registration Number   791UA (d) Submitter Type   CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code   7210 (a) Operator Designator   UALA Operator Type Air Carrier (A) (b) When Discovered   NOT REPORTED (NR)       (c) How Unknown (9) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition   FLUID LOSS (K)
  FLUID LOSS (J)
BOEING 777222 26933 31238 4872 (e) Precautionary Procedure   OTHER (O)   (c) Engine PWA PW4090 (f) FAA Region   WP     (g) Dist.Off.   29 (d) Propeller 4. Problem Description NR 2 ENGINE LOSS OF OIL PRESS/QUANTITY, TEMP INCRG/PRESS DCRSG. AMBER ALERT DECLARED FOR EMERGENCY EQUIPMENT, ACFT LANDED NORMALLY. FOUND MEATL ON THE MAIN & ANGLE GEARBOX (AGB) CHIP DETECTOR. THE ENGINE WAS REPLACED IN SEA. (NOTE: THE MASTER MCD HAD CHECKED CLEAN AT ORD, IMMEDIATELY PRIOR TO THIS FLIGHT.) AT TEARDOWN, THE AGB HOUSING WAS FOUND LEAKING FROM A CRACK. ADDITIONALLY, THE AGB SHOWED HEAVY SIGNS OF COKING AND HEAT DISTRESS. THE AGB HAD ONLY BEEN INSTALLED FOR 214 HOURS (32 CYCLES). THE PRIOR AGB ON THIS ENGINE HAD SUFFERED SIMILAR COKING AND HEAT DISTRESS. IN SPITE OF ALL ENGINE MODULES HAVING BEEN DISASSEMBLED, NO ROOT CAUSE WAS FOUND.

2005UALA00127 (b) Difficulty Date 02/07/2005 (c) Registration Number 793UA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 2612 (a) Operator Designator UALA Operator Type Air Carrier (A) (b) When Discovered CRUISE (CR) (c) How Other (O) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition WARNING INDICATION (J)
BOEING 777222 26946 33160 5141 (e) Precautionary Procedure ENGINE SHUTDOWN (E) (A) (c) Engine PWA PW4090 (f) FAA Region WP (g) Dist.Off. 29 (d) Propeller 4. Problem Description LT ENG FIRE LOOP AND LT ENG OVERHT DETECT EICAS MESSAGES. OIL QTY AND OIL PRESSURE DROPPED. ENGINE SHUTDOWN. EMERGENCY DECLARED. ENGINE REPLACED. FOUND ONE HPT STG-2 BLADE FAILED AT AIRFOIL MID-SPAN AS A RESULT OF INTERNAL SULFIDATION. ANOTHER BLADE FAILED NEAR THE AIRFOIL PLATFORM, AS A RESULT OF CONTACT WITH DEBRIS FROM 1ST BLADE. RESULTED IN VIBRATION. OVER TIME, CAUSED FAILURE OF THE FIRE/OVERHEAT LOOPS, & RESULTED IN CRACKING OF OIL PRESSURE LINE BETWEEN SERVO FUEL HEATER & AIR OIL HEAT EXCHANGER. CAUSE OF BLADE SULFIDATION CONTAMINATION OF COOLING PASSAGES WITH TURBO-TIP COATING. PWA HAS CHANGED COATING PROCESS TO PRECLUDE FUTURE CONTAMINATION.

DL777050136 (b) Difficulty Date 02/27/2005 (c) Registration Number 864DA (d) Submitter Type CARRIER PART 121 (A) 2. Codes 3. Major Equipment Identity (a) JASC Code 7200 (a) Operator Designator DALA Operator Type Air Carrier (A) (b) When Discovered INSP/MAINT (IN) (c) How Unknown (9) (b) Aircraft Manufacturer Model Serial Number Total Time Total Cycles (d) Nature of Condition OTHER (O)
BOEING 777232 29736 20788 3540 (e) Precautionary Procedure NONE (K) (c) Engine RROYCE RB211* 051201 19883 3535 (f) FAA Region SO (g) Dist.Off. 27 (d) Propeller 4. Problem Description METAL DISCOVERED IN MCD AND SCAVENGE FILTER NR 2 ENGINE. REPLACED ENGINE. (Example of a incomplete SDR filing; no root reason given. No required followup SD filed over the next six months - JK)

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