MD-11 Airworthiness Dierectives - as a frightening statistic

Colour Code :

GREY = electrical/wiring

Lt Grey = Blankets

White = other

32/94 did not involve electrical rectification or thermal/acoustic blankets

(i.e. 34% or a 1/3rd)

4 AD's are blanket replacement related

61.7% of MD-11 AD's are

electrical/wiring modifications

Note: Also keeping in mind that other such discrepancies have been addressed separately by SIL's (Service Information Letters), AOM's (All Operator Messages), SB's and ASB's.

Pre-Swissair 111 electrical AD's are amplified

MD-11 Series (all)

2002-17-06

01/04/2000

Galley Load Control Unit Within the No. 3 Bay Electrical Power Center

2002-13-10

08/12/2002

Fuel boost/transfer pump connectors

2001-21-05

11/26/2001

Airplane Flight Manual--Flight Management Computers

2001-17-12

09/26/2001

Air Driven Generator Wire Assembly

2001-17-11

09/26/2001

Terminal Strips and Adjacent Structure of Wheel Well

2001-17-10

09/26/2001

Wire Bundles Adjacent to Disconnect Panel Bracket Assembly

2001-17-09 R1

09/27/2001

Main Observer's Station

2001-17-08

09/26/2001

Number 2 Integrated Drive Generator

2001-17-07

09/26/2001

Insulation Blankets of Forward Center Cargo Compartments

2001-17-06

09/26/2001

Cargo Roller Circuit Breakers

2001-17-05

09/26/2001

Electrical Wires of the Cockpit

2001-14-08

08/16/2001

Electric Motors of the Auxiliary Hydraulic Pump

2001-09-10

05/17/2001

Airplane Flight Manual (AFM) - Limitations Section - Operational Limits

2001-05-10

04/25/2001

Thrust Reverser System And Interlocks

addresses thrust reverser system wiring

2000-26-15

01/17/2001

Map Light Assemblies

2000-24-17

01/08/2001

Forward and Center Cargo Control Units Deactivation

2000-24-16

01/08/2001

One Phase Remote Control Circuit Breaker

2000-24-14

01/08/2001

Electrical Wires

2000-24-12

01/08/2001

Center Accessory Compartment Terminal Strips Electrical Wires

2000-24-10

01/08/2001

B7-28 Bus Relocation

2000-24-09

01/08/2001

Main External Power Ground Studs

2000-22-21

12/05/2000

Fuel Pump Electrical Connector

2000-15-14

08/23/2000

Remote Control Circuit Breakers

2000-15-13

08/23/2000

Circuit Breakers

2000-14-12

08/23/2000

Upper and Lower Reading Lights in the Forward Crew Rest Area

2000-11-02

06/30/2000

Insulation Blankets

2000-07-21

05/19/2000

Wiring of Control Panel of Auxiliary Power Unit (APU)

2000-07-20

05/19/2000

Electrical Power Center (EPC)

2000-07-19

05/19/2000

External Ground Power Feeder Cables

2000-07-18

05/19/2000

Generator Power Feeder Wires

2000-07-17

05/19/2000

Circuit Breaker Panel

2000-07-16

05/19/2000

Power Feeder Cable

2000-07-15

05/19/2000

Circuit Breakers And Electrical Connector Contacts

2000-07-14

05/19/2000

Passenger Seat Wire Assembly

2000-03-16

03/23/2000

Brake Pedal Position

2000-03-14

03/23/2000

Battery Ground Cable

2000-03-13

03/23/2000

Wire Bundle Installation behind the First Observer's Station

2000-03-11

03/23/2000

Windshield Anti-Ice Power Controllers

99-24-03

12/27/99

Wire Harness Support Bracket/Clamp

99-20-08

10/13/99

In-Flight Entertainment Network (IFEN)

99-09-03

05/07/99

Wiring & Wire Bundles Of Main Avionics Rack

99-09-02

05/07/99

Wiring And Support Bracket In Aft Storage Compartment

99-09-01

05/07/99

Center Accessory Compartment (CAC) Support Bracket Installations

99-06-08

04/16/99

Forward Trunnion Bolt

99-03-02

02/12/99

Electrical Wiring

98-25-15

01/19/99

Attachment Bolts On Forward And Aft Flanges

98-24-24

12/30/98

Seat Tracks And Adjacent Structure At Lavatory

98-24-02 R1

10/03/2001

Flight Compartment Overhead Instrument Panel Light and Circuit Breaker Lightplate

98-16-01

08/14/98

Horizontal Stabilizer Actuator Assembly

intended to prevent excessive free play and wear of the horizontal stabilizer actuator assembly, which could result in a free-floating horizontal stabilizer, and consequent loss of aircraft pitch control.

97-09-07

06/06/97

Transfer Pipe Assembly

97-07-12

05/13/97

verify proper installation of the electrical connectors to the engine generator and fire bell shutoff switches, and correction of the installation.

Intended to prevent the wrong engine-driven generator from being shut down unnecessarily in the event of an engine fire warning

96-25-19

01/27/97

Power Feeder Cable Of Auxiliary Power Unit (APU)

reports of burning and arcing of the connector contacts of the power feeder cable of the APU generator

96-25-15

01/27/97

Honeywell Standard Windshear Detection System

96-19-03

10/16/96

Hi-Lok Fasteners At Inboard Flap Inboard Track

96-16-02

09/03/96

Inboard And Outboard Flap Actuators

96-14-04

08/13/96

Nose Landing Gear Lock Link Bolt

96-10-16

06/20/96

Cabin Sidewall Vent Box Diaphragms

96-05-04

03/22/96

Install Control Cable Guard

reports of burnt electrical wire cable in the cabin attendant console that was caused by chafing of the wire cable against certain flight control cables.

96-03-05

03/13/96

Right And Left MLG Trunnion Bolts

96-01-02

02/20/96

Aft Mount Beam Assembly

95-26-06

01/04/96

AFM - Automatic Landing Section

prompted by a report of improper wiring of the FSCP during production of these airplanes. The actions specified in this AD are intended to prevent degradation of the automatic landing system during flight due to improper wiring of the FSCP

95-25-04

01/25/96

Inspect Ground Stud Assemblies

AD was prompted by reports indicating that arcing occurred across the pins in the galley external power receptacle due to loose attach hardware on the ground stud. The actions specified in that AD are intended to ensure that the ground stud assemblies are attached correctly so that arcing will not occur. Such arcing, if not corrected, could result in heat damage to adjacent structure and a fire in the forward cargo compartment, the center accessory compartment, or the aft fuselage compartment.

95-23-07

12/27/95

Wing Pylon

95-22-13

11/20/95

Inspect Wire Bundle In Avionics Compartment

report of smoke and fire in the avionics compartment floor area that was caused by electrical arcing that occurred as the result of chafed wiring

95-21-04

10/27/95

Support Structure Of Cargo Liner

AD was prompted by a report of chafing and arcing in the vacuum waste exhaust heater that caused a spark to ignite the surrounding insulation blankets

95-16-05

08/17/95

NLG Lower Drag Link

95-16-01

08/18/95

AFM Changes - Autoland Operation

reports of a loose nut on a coaxial connector on a radio altimeter receiver/transmitter. ...transmittal of erroneous altitude data to the FCC while the airplane was below 100 feet AGL, which resulted in abnormal flare (pitch) control during autoland operation

95-11-02

06/21/95

Inspect Nose Landing Gear Lock Links

95-10-02

06/12/95

Slat Control System

requires the installation of an electrically controlled slat system. This amendment is prompted by numerous incidents of inadvertent deployment of the slats while the airplane was in flight at cruise altitude. The actions specified by this AD are intended to prevent inadvertent deployment of the slats during flight, which could result in an abrupt pitch up of the airplane and consequent injury to crew and passengers; it could also result in significant vibrations and cause damage to the elevators

94-26-51

02/06/95

AFM Changes - Autoland Operation

exact failure mode of the radio altimeter coaxial cable that can produce the leakage is unclear at this time..Early and/or abnormal flare (pitch) control during autoland operation, if not corrected, could result in degradation of the landing capability

94-24-03

01/03/95

Spoiler

94-15-02

08/19/94

Engine Mount Structure

94-13-07

07/08/94

Inspect Aft Engine Mount Link Assembly

94-08-03

05/23/94

Main Landing Gear Pistons

94-07-01

05/16/94

Modify Cavity Vent Drain Tube Assembly

a report that the cavity vent tube, if not properly grounded, could act as an electrical path in the event of a lightening strike. The actions specified by this AD are intended to prevent arcing in the tank cavity and possible resulting fire.

94-05-06

04/04/94

Passenger Cabin Floor Panels

94-02-08

02/10/94

Main Avionics Rack Wiring

actions specified in this AD are intended to prevent chafing of the main avionics rack wiring, which could result in arcing and a fire in the wire bundle -report of a chafed wire harness found on the main avionics rack on one airplane that resulted in arcing damage to the wire harness and adjacent structure

94-02-07

02/28/94

Center Gear Drag Link

93-15-03

08/04/93

Slat Control Module

93-12-03

07/07/93

Tail Fuel Tank

Inspect the insulation blankets in the center cargo bilge area to detect fuel contamination and replace any fuel contaminated insulation blanket with a serviceable blanket

93-08-07

05/11/93

Inspect EPSC Wire Assemblies

prevent chafing of the electrical power system control (EPSC) wire assemblies located in the center accessory compartment (CAC), which potentially could result in a fire

93-05-20

04/30/93

Hydraulic Pump Overtemperature Switches

To prevent loss of a hydraulic system, modify the wiring to the engine-driven hydraulic pump overtemperature switches

93-04-01

04/02/93

Flight Compartment Circuit Panel

to prevent display units from going blank, which could lead to momentary loss of flight critical display information

92-27-11 R1

02/08/93

Engine Emergency Fire Extinguisher

92-26-03