# AD 71-24-06: Attach Lug Engine Mount Strut

- Type: Airworthiness directive
- Status: Current
- Products: FH1100 Manufacturing FH-1100
- Effective: November 26, 1971
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-1338
- Registered aircraft: 8 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/64725FDCFD751B0886256A38005FD970.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/71-24-06

## The airworthiness directive

71-24-06 FAIRCHILD HILLER ROTORCRAFT: Amdt. 39-1338. Applies to FH1100 Type Helicopters Certificated in all Categories.

Compliance required as indicated.

To preclude fatigue failure of the rear attachment lug on engine mount strut P/N 24-63110-1 accomplish the following:

a. Within the next 25 hours' time in service after the effective date of this AD unless already accomplished, inspect and replace if necessary, engine mount strut P/N 24-63110-1 in accordance with Section 2, subsection A.1. and A.2., Accomplishment Instructions, Fairchild Hiller Service Bulletin SB FH1100-71-2 dated 30 September 1971 or later FAA-approved revision or an alternate method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region.

b. Within the next 100 hours' time in service after the effective date of this AD unless already accomplished, alter engine mount strut P/N 24-63110-1 in accordance with Section 2, subsection A.3. through A.8., Accomplishment Instructions, F/H Service Bulletin SB FH1100-71-2 dated 30 September 1971 or later FAA-approved revision or an alternate method approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.

This amendment is effective November 26, 1971.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H2WE](https://openairdocs.org/tcds/H2WE): Air Space Design and Manufacturing LLC; names 1 of 2 models: FH-1100

## 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: 8 (8 by airframe model, 0 by engine model)
- Makers: Fairchild Hiller 8

Models with the most aircraft:

- [Fairchild Hiller FH-1100](https://openairdocs.org/model/fairchild-hiller-fh-1100): 8 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/71-24-06/models.md
Every aircraft: https://openairdocs.org/ad/71-24-06/aircraft.md

Its text cites no advisory circulars or STCs.

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