# AD 92-09-03: Brake Replacement

- Type: Airworthiness directive
- Status: Current
- Products: Boeing DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), DC-9-87 (MD-87) and MD-88
- Effective: May 22, 1992
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-8228
- Docket: 91-NM-239-AD
- Registered aircraft: 100 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DAAF81B3334211E886256A080064F73E.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/92-09-03

## The airworthiness directive

92-09-03 MCDONNELL DOUGLAS: Amendment 39-8228. Docket No. 91-NM-239-AD.

Applicability: Model DC-9-80 series and MD-88 airplanes, equipped with brake part numbers identified in paragraph (a) of this AD, certificated in any category.

Compliance: Required as indicated, unless accomplished previously.

To prevent loss of main landing gear braking effectiveness, accomplish the following:

  (a) Within 180 days after the effective date of this AD, inspect the brakes having brake part numbers specified, below, for wear. Any brake worn more than the maximum wear limit specified below must be replaced, prior to further flight, with a brake within this limit.

Douglas Brake Part Number

Maximum Wear Limit (inches)

For airplanes with an approved Flight Manual MGTOW of 149,500 lb:

2608892-1

1.20 5004321-3/-4/-5 all Trapezoid 0.65 5004321-6 Bullnose 0.70 " -6 Trapezoid 0.75 " -10 Bullnose 0.70 " -11 Trapezoid (Standard) 1.00 " -11 Trapezoid (Rebalanced) 1.20 " -12 Trapezoid 0.70 5007898 Trapezoid 0.75 5007898-1 Trapezoid 0.80

For airplanes with an approved Flight Manual MGTOW of 160,000 lb:

2608892-1

0.70 5007898 Bullnose 0.45 5007898-1 Trapezoid 0.50

  (b) Within 180 days after the effective date of this AD, incorporate the maximum brake wear limits specified in paragraph (a) of this AD, into the FAA-approved maintenance inspection program.

  (c) An alternative method of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. The request should be forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Los Angeles ACO.(d) Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate the airplane to a location where the requirements of this AD can be accomplished.

  (e) This amendment becomes effective on May 22, 1992.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A6WE](https://openairdocs.org/tcds/A6WE): The Boeing Company; names 5 of 25 models: MD-88, DC-9-81 (MD-81), DC-9-83 (MD-83), DC-9-87 (MD-87), DC-9-82 (MD-82)

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 100 (100 by airframe model, 0 by engine model)
- Makers: Mcdonnell Douglas 99, Douglas 1

Models with the most aircraft:

- [Mcdonnell Douglas DC-9-83(MD-83)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-83-md-83): 49 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-82(MD-82)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82-md-82): 22 aircraft (airframe model)
- [Mcdonnell Douglas MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88): 14 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-87](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87): 13 aircraft (airframe model)
- [Douglas DC-9-83](https://openairdocs.org/model/douglas-dc-9-83): 1 aircraft (airframe model)
- [Mcdonnell Douglas DC-9-87 (MD-87)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87-md-87): 1 aircraft (airframe model)

All 7 models: https://openairdocs.org/ad/92-09-03/models.md
Every aircraft: https://openairdocs.org/ad/92-09-03/aircraft.md

Its text cites no advisory circulars or STCs.

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