# AD 84-07-02: Cargo Door Lock Mechanism

- Type: Airworthiness directive
- Status: Current
- Products: Mitsubishi Heavy Industries YS-11, YS-11A-200, YS-11A-300, YS-11A-500 and YS-11A-600
- Effective: April 9, 1984
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-4836
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9FE3A856A8B05907862569F20070AA2B.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-07-02

## The airworthiness directive

84-07-02 NAMC (NIHON AIRPLANE MANUFACTURING COMPANY): Amendment 39-4836. Applies to all Model NAMC YS-11/-11A series airplanes fitted with a main deck cargo door certificated in all categories. To prevent inadvertent opening of the main deck cargo door during flight, accomplish the following, unless already accomplished:

A. Within 450 flight hours time in service or 90 days after the effective date of this AD, whichever occurs first, modify the main cargo door handle lock mechanism in accordance with NAMC YS-11 Service Bulletin 52-92, Revision 1, dated September 29, 1983.

B. Alternate means of compliance which provide an equivalent level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region.

C. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base for the accomplishment of inspections and/or modifications required by this AD.

This amendment becomes effective April 9, 1984.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A1PC](https://openairdocs.org/tcds/A1PC): Mitsubishi Heavy Industries Ltd.; names 5 of 5 models: YS-11, YS-11A-300, YS-11A-500, YS-11A-600, YS-11A-200

## 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 (1 by airframe model, 0 by engine model)
- Makers: Nihon 1

Models with the most aircraft:

- [Nihon YS-11A-500](https://openairdocs.org/model/nihon-ys-11a-500): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/84-07-02/models.md
Every aircraft: https://openairdocs.org/ad/84-07-02/aircraft.md

Its text cites no advisory circulars or STCs.

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