# AD 82-01-06: Engine Mount Central Leg

- Type: Airworthiness directive
- Status: Current
- Products: Agusta A109A and A109A II
- Effective: February 8, 1982
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Rotorcraft
- Amendment: 39-4290
- Registered aircraft: 23 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A9EAE70A72F8891E86256A4E00512B82.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/82-01-06

## The airworthiness directive

82-01-06 COSTRUZIONI AERONAUTICHE GIOVANNI AGUSTA: Amendment 39-4290. Applies to Model A109A series helicopters through Serial Number 7169 equipped with engine mount central legs, P/N 109-0605-06 and 109-0605-07, certificated in all categories (Airworthiness Docket No. 81-ASW-43).

Compliance is required within 200 hours' time in service after the effective date of this AD, unless already accomplished.

To prevent failure of the engine mount central leg and possible loss of engine support, accomplish the following:

  (a) Remove the engine mount central legs, P/N 109-0605-06-13, 109-0605-06-14, 109-0605-07-13, and 109-0605-07-14.

  (b) Install engine mount central leg assemblies, P/N 109-0640-84-1 and -2, and P/N 109-0640-85-1 and -2 as described in Section 71-20-00 of the A109A maintenance manual.

  (c) Install engines and check engine to transmission alignment as described in Section 71-00-00 of the A109A maintenance manual.

  (d) If an equivalent means of compliance is used in complying with this AD, that equivalency must be approved by the Chief, Aircraft Certification Staff, AEU-100, FAA, Europe, Africa and Middle East Office, c/o American Embassy, Brussels, Belgium. Compliance with Agusta Technical Bulletin No. 109-25, dated August 29, 1980, constitutes compliance with this AD.

This amendment becomes effective February 8, 1982.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS H7EU](https://openairdocs.org/tcds/H7EU): Leonardo S.p.A.; names 2 of 10 models: A109A, A109A II

## 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: 23 (23 by airframe model, 0 by engine model)
- Makers: Agusta 22, Agusta-Bell 1

Models with the most aircraft:

- [Agusta A109A II](https://openairdocs.org/model/agusta-a109a-ii): 17 aircraft (airframe model)
- [Agusta A109A](https://openairdocs.org/model/agusta-a109a): 5 aircraft (airframe model)
- [Agusta-Bell A 109A](https://openairdocs.org/model/agusta-bell-a-109a): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/82-01-06/models.md
Every aircraft: https://openairdocs.org/ad/82-01-06/aircraft.md

Its text cites no advisory circulars or STCs.

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