# AD 75-23-05: Aileron Trim Tab

- Type: Airworthiness directive
- Status: Current
- Products: Airbus BAC 1-11 200 Series and BAC 1-11 400 Series
- Effective: November 19, 1975
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-2416
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/34784773ADE250B4862569A4006EE7AF.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/75-23-05

## The airworthiness directive

75-23-05 BRITISH AIRCRAFT CORPORATION: Amendment 39-2416. Applies to Model BAC 1-11 200 and 400 Series airplanes certificated in all categories.

Compliance is required as indicated, unless already accomplished.

To prevent possible failure of aileron trim tab connecting rods, accomplish the following:

  (a) Within the next ten hours' time in service after the effective date of this AD, inspect the aileron trim tab connecting rods, P/N AB33A445 (200 Series) or P/N AK 33A445 (400 Series), for minimum clearance with adjacent structure, cracks, and bowing in accordance with paragraphs 1. through 4. of British Aircraft Corporation telegram to all operators, 27-CW-PM5310, dated October 23, 1974, (hereinafter referred to as BAC telegram) or an FAA-approved equivalent.

  (b) If during the inspection required by paragraph (a) of this AD, a connecting rod is found to be cracked or bowed, before further flight, except that the airplane may be flown in accordance with FAR Section 21.197 and 21.199 to a base where the repair can be performed -

  (1) Replace the cracked or bowed part with a serviceable part of the same part number or an FAA-approved equivalent part; and

  (2) Comply with paragraph (e) of this AD.

  (c) If during the inspection required by paragraph (a) of this AD, an indication of contact of an aileron trim tab connecting rod with the adjacent structure is found but the connecting rod is free of cracks and bowing, before further flight, except that the airplane may be flown in accordance with FAR Section 21.197 and 21.199 to a base where the repair can be performed -

  (1) Restore the protective finish to all dented and chafed areas of the connecting rod, and

  (2) Comply with paragraph (e) of this AD.

  (d) If during the inspection required by paragraph (a) of this AD, insufficient clearance is found between an aileron trim tab connecting rod and adjacent structure and paragraphs (b) and (c) of this AD are not applicable, complywith paragraph (e) of this AD within 1000 hours' time in service after being inspected in accordance with paragraph (a) of this AD.

  (e) Provide the minimum clearance, between the aileron trim tab connecting rod and adjacent structure, as specified in paragraphs 1., 2., or 3. of the BAC telegram, as applicable, or an FAA-approved equivalent. If alternation of the structure adjacent to an aileron trim tab connecting rod is necessary to provide the proper minimum clearance, the alteration must be accomplished in accordance with paragraph 7. of the BAC telegram as amended by issue 2 of the telegram dated October 25, 1974.

  (f) For purposes of this AD, the term "Land" as used in paragraph 7 of the BAC telegram as amended by issue 2 to the telegram, dated October 25, 1974, means "edge distance".

This amendment becomes effective November 19, 1975.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A5EU](https://openairdocs.org/tcds/A5EU): Airbus SAS; names 2 of 2 models: BAC 1-11 200 Series, BAC 1-11 400 Series

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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