# AD 69-06-01: Flap Drive System

- Type: Airworthiness directive
- Status: Current
- Products: Maryland Air Industries F-27, F-27A, F-27B, F-27F, F-27G, F-27J and F-27M
- Effective: March 26, 1969
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-734
- Registered aircraft: 1 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/55DE8AD26BC430178625698500669F62.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/69-06-01

## The airworthiness directive

69-06-01 FAIRCHILD-HILLER: Amdt. 39-734. Applies to Type F-27 Airplanes Serial Numbers 1 through 124 inclusive. Incorporating Cutler Hammer P/N 6046 H46 Relay in Flap Control System.

Compliance required as follows:

To prevent hazards associated with flap drive system failure whereby the flaps are driven off the drive screw jacks, accomplish the following:

  (a) Within the next 200 hours time in service after the effective date of this AD, and thereafter at 200 hour intervals from the date of the last inspection, open cover of wing flap system motor relay and visually inspect all contacts. Any finding of contact pitting or discoloration of contacts requires replacement of the relay with an unused part. The inspection may be terminated upon completion of the requirement of paragraph (b) of this AD.

  (b) Within the next 500 hours time in service after the effective date of the AD, unless already accomplished, rewire the flap drive circuit in accordance with Fairchild Hiller F- 27 Service Bulletin F-27-27-67 dated February 1, 1969, for F-27 aircraft, or later revisions approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, or perform an equivalent modification approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

  (c) Upon request with substantiating data submitted through an FAA Maintenance Inspector, compliance time may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

This amendment is effective March 26, 1969.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 7A1](https://openairdocs.org/tcds/7A1): Maryland Air Industries Inc.; names 7 of 12 models: F-27, F-27A, F-27M, F-27J, F-27F, F-27B, F-27G

## 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: Fairchild 1

Models with the most aircraft:

- [Fairchild F-27F](https://openairdocs.org/model/fairchild-f-27f): 1 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/69-06-01/models.md
Every aircraft: https://openairdocs.org/ad/69-06-01/aircraft.md

Its text cites no advisory circulars or STCs.

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