# AD 90-09-08: Crew Seats

- Type: Airworthiness directive
- Status: Current
- Products: Boeing 737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series, 737-700C Series, 737-800 Series, 737-900 Series, 747-100 Series and 38 more
- Effective: May 29, 1990
- Superseded by: Nothing supersedes this AD
- Product type: Appliance
- Amendment: 39-6486
- Docket: 89-ANE-28
- Registered aircraft: 1,741 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3E1579D27F51C4DB86256A400073F425.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/90-09-08

## The airworthiness directive

90-09-08 IPECO: Amendment 39-6486. Docket No. 89-ANE-28.

Applicability: IPECO TSO-C39a crew seats, as follows:

Seat Part Number Serial no. effectivity Installed in but not limited to 3A090-0021-01-2 up to and including Boeing 737 3A090-0022-01-2 11009

3A090-0021-02-2

3A090-0022-02-2

3A090-0019-01-1 up to and including Boeing 737 3A090-0020-01-1 11115

3A090-0015-01-1 up to and including Boeing 757, 767 3A090-0016-01-1 11143

3A090-0025-01-1 up to and including Boeing 757, 767 3A090-0026-01-1 11054

3A090-0053-01-1 up to and including Boeing 747-400 3A090-0054-01-1 11105

3A090-0027-01-1 up to and including Boeing 747 3A090-0028-01-1 11072

3A102-0003-01-1 up to and including Boeing 747-400

11041

3A090-0055-01-1 up to and including Boeing 747-400 3A090-0056-01-1 11062

3A103-0003-01-1 up to and including Boeing 747-400

10607

3A090-0017-01-1 up to and including Boeing 747 3A090-0018-01-1 10100

3A090-0065-01-1 up to and including Boeing 747-400 3A090-0066-01-1 11635

3A118-0003-01-1 up to and including DeHavilland 3A118-0004-01-1 11580 DHC-7 and DHC-8

Compliance: Required as indicated, unless already accomplished. To prevent failure of the seat back structure, accomplish the following:

  (a) Within the next 30 days after the effective date of this AD, unless already accomplished within the last 100 days and, thereafter, at intervals not to exceed 130 days from the last inspection, visually inspect the seat assembly as follows:

  (1) Remove seat pan cushion and back cushion from the seat assembly. Adjust the lumbar mechanism to the fully up, fully back position. Recline seat back to full recline.

  (2) By looking through the lightening holes in the pan and back structure with a flashlight, examine the base of the back structure in the area where it attaches to the reclining mechanism. This area can be identified by the bracket at the base of the back structure. Return the seat back to its upright position and also examine the base of the back structure from the rear of the seat.

  (3) If any crack or deformation of the seat back structure is found, replace the seat assembly with a serviceable unit before further flight.

  (4) When the repairs and modifications required by paragraph (b) have been accomplished, the repetitive visual inspections may be terminated.

  (b) Within the next 15 months after the effective date of this AD, perform the repairs and modifications of the IPECO seat assemblies in accordance with the following service bulletins (SB):

IPECO SB No. Applicable IPECO seat part numbers A001-25-29 3A090-0021-01-2

3A090-0022-01-2

3A090-0021-02-2

3A090-0022-02-2

A001-25-30 3A090-0019-01-1

3A090-0020-01-1

A001-25-31 3A090-0015-01-1

3A090-0016-01-1

A001-25-32 3A090-0025-01-1

3A090-0026-01-1

A001-25-33 3A090-0053-01-1

3A090-0054-01-1

A001-25-34 3A090-0027-01-1

3A090-0028-01-1

A001-25-35 3A102-0003-01-1

A001-25-36 3A090-0055-01-1

3A090-0056-01-1

A001-25-37 3A103-0003-01-1

A001-25-38 3A090-0017-01-1

3A090-0018-01-1

A001-25-39 3A090-0065-01-1

3A090-0066-01-1

A001-25-40 3A118-0003-01-1

3A118-0004-01-1

  (c) Aircraft may be ferried in accordance with the provisions of FAR 21.197 and 21.199 to a base where the AD can be accomplished.

  (d) Upon submission of substantiating data by an owner or operator through an FAA Airworthiness Inspector, an alternate method of compliance with the requirements of this AD or adjustments to the compliance schedule specified in this AD may be approved by the Manager, Boston Aircraft Certification Office, Engine and Propeller Directorate, Aircraft Certification Service, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803.

The repair and modification procedures shall be done in accordance with IPECO SB No. A001-25-29, Issue No. 2, pages 1 and 2 dated April 28, 1989, and pages 3 through 18 inclusive, dated August 25, 1988; IPECO SB No. A001-25-30, Issue No. 2, pages 1 and 2 dated April 28, 1989, and pages 3 through 18 inclusive, dated September 9, 1988; and IPECO SB Nos. A001-25-31 through A001-25-40 inclusive, all Issue No. 2, pages 1 and 2 dated April 28, 1989, and pages 3 through 18 inclusive, dated September 13, 1988. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from IPECO Inc., 15201 South Prarie Avenue, Lawndale, California 90260. Copies may be inspected at the Regional Rules Docket, Office of the Assistant Chief Counsel, Federal Aviation Administration, New England Region, 12 New England Executive Park, Room 311, Burlington, Massachusetts 01803, or at the Office ofthe Federal Register, 1100 L Street, NW, Room 8301, Washington, DC 20591.

This amendment (39-6486, AD 90-09-08) becomes effective on May 29, 1990.

## Affected data sheets (6) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 13 of 14 models: 747-100B Series, 747SP Series, 747-400D Series, 747-400F Series, 747-200B Series, 747-200F Series, 747-300 Series, 747-200C Series…
- [TCDS A13NM](https://openairdocs.org/tcds/A13NM): De Havilland Aircraft of Canada Limited; names 12 of 16 models: DHC-8-101, DHC-8-102, DHC-8-103, DHC-8-106, DHC-8-201, DHC-8-202, DHC-8-301, DHC-8-311…
- [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 11 of 17 models: 737-500 Series, 737-900 Series, 737-100 Series, 737-200C Series, 737-700C Series, 737-800 Series, 737-300 Series, 737-200 Series…
- [TCDS A20EA](https://openairdocs.org/tcds/A20EA): De Havilland Aircraft of Canada Limited; names 5 of 5 models: DHC-7-101, DHC-7-103, DHC-7-102, DHC-7-100, DHC-7-1
- [TCDS A1NM](https://openairdocs.org/tcds/A1NM): The Boeing Company; names 4 of 5 models: 767-300 Series, 767-200 Series, 767-400ER Series, 767-300F Series
- [TCDS A2NM](https://openairdocs.org/tcds/A2NM): The Boeing Company; names 4 of 4 models: 757-200CB Series, 757-200PF Series, 757-300 Series, 757-200 Series

## 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: 1,741 (1,741 by airframe model, 0 by engine model)
- Makers: Boeing 1,643, Bombardier 57, Dehavilland 35, Boeing Of Canada/Dehav Div 6

Models with the most aircraft:

- [Boeing 737-823](https://openairdocs.org/model/boeing-737-823): 278 aircraft (airframe model)
- [Boeing 767-300F](https://openairdocs.org/model/boeing-767-300f): 169 aircraft (airframe model)
- [Boeing 737-800](https://openairdocs.org/model/boeing-737-800): 139 aircraft (airframe model)
- [Boeing 737-824](https://openairdocs.org/model/boeing-737-824): 135 aircraft (airframe model)
- [Boeing 737-832](https://openairdocs.org/model/boeing-737-832): 71 aircraft (airframe model)
- [Boeing 757-232](https://openairdocs.org/model/boeing-757-232): 63 aircraft (airframe model)
- [Boeing 737-890](https://openairdocs.org/model/boeing-737-890): 60 aircraft (airframe model)
- [Boeing 767-332](https://openairdocs.org/model/boeing-767-332): 46 aircraft (airframe model)
- [Boeing 757-224](https://openairdocs.org/model/boeing-757-224): 40 aircraft (airframe model)
- [Boeing 757-222](https://openairdocs.org/model/boeing-757-222): 38 aircraft (airframe model)
- [Boeing 737-724](https://openairdocs.org/model/boeing-737-724): 36 aircraft (airframe model)
- [Boeing 767-322](https://openairdocs.org/model/boeing-767-322): 36 aircraft (airframe model)
- [Boeing 747-8F](https://openairdocs.org/model/boeing-747-8f): 33 aircraft (airframe model)
- [Boeing 767-323](https://openairdocs.org/model/boeing-767-323): 27 aircraft (airframe model)
- [Bombardier DHC-8-402](https://openairdocs.org/model/bombardier-dhc-8-402): 26 aircraft (airframe model)
- [Boeing 757-223](https://openairdocs.org/model/boeing-757-223): 23 aircraft (airframe model)
- [Boeing 767-432ER](https://openairdocs.org/model/boeing-767-432er): 21 aircraft (airframe model)
- [Boeing 757-236](https://openairdocs.org/model/boeing-757-236): 20 aircraft (airframe model)
- [Boeing 757-251](https://openairdocs.org/model/boeing-757-251): 18 aircraft (airframe model)
- [Dehavilland DHC-8-202](https://openairdocs.org/model/dehavilland-dhc-8-202): 17 aircraft (airframe model)

All 136 models: https://openairdocs.org/ad/90-09-08/models.md
Every aircraft: https://openairdocs.org/ad/90-09-08/aircraft.md

Its text cites no advisory circulars or STCs.

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