# AD 84-19-05: Engine Mount Systems

- Type: Airworthiness directive
- Status: Current
- Products: Twin Commander 690, 690A, 690B, 690C, 690D, 695 and 695A
- Effective: October 8, 1984
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4925
- Registered aircraft: 200 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B4B549464BC69AAF86256A4D0047BE8A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-19-05

## The airworthiness directive

84-19-05 GULFSTREAM AEROSPACE CORPORATION: Amendment 39-4925. Applies to Models 690 and 690A, (S/Ns 11001 through 11284 which have had engine isolator assemblies replaced after July 28, 1975); 690A (S/Ns 11285 through 11344); 690B (S/Ns 11350 through 11566); 690C (S/Ns 11600 through 11732); 690D (S/Ns 15001 through 15033 and 15037); 695 (S/Ns 95000 through 95084); 695A (S/Ns 96001 through 96061, 96063 through 96072, 96075, 96078, 96085, and 96088) airplanes certificated in any category.

Compliance: Required as indicated, unless already accomplished.

To prevent failure of the engine mount systems accomplish the following: (a) Within 50 hours time-in-service after the effective date of this AD, inspect and modify, if required, the engine mount systems in accordance with Gulfstream Aerospace Corporation Service Bulletin SB201 issued May 11, 1984.

  (b) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

  (c) An equivalentmethod of compliance with this AD may be used if approved by the Manager, Airplane Certification Branch, ASW-150, FAA, Southwest Region, Post Office Box 1689, Fort Worth, Texas 76101; telephone (817) 877-2070.

This amendment becomes effective on October 8, 1984.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 2A4](https://openairdocs.org/tcds/2A4): Twin Commander Aircraft LLC; names 7 of 21 models: 690C, 690A, 690D, 690B, 695, 695A, 690

## 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: 200 (200 by airframe model, 0 by engine model)
- Makers: Rockwell International 126, Gulfstream AM Corp Comm Div 44, Aero Commander 25, Twin Commander 3, Gulfstream Aerospace 2

Models with the most aircraft:

- [Rockwell International 690B](https://openairdocs.org/model/rockwell-international-690b): 59 aircraft (airframe model)
- [Rockwell International 690A](https://openairdocs.org/model/rockwell-international-690a): 34 aircraft (airframe model)
- [Aero Commander 690A](https://openairdocs.org/model/aero-commander-690a): 22 aircraft (airframe model)
- [Rockwell International 690C](https://openairdocs.org/model/rockwell-international-690c): 21 aircraft (airframe model)
- [Gulfstream AM Corp Comm Div 695A](https://openairdocs.org/model/gulfstream-am-corp-comm-div-695a): 17 aircraft (airframe model)
- [Gulfstream AM Corp Comm Div 690C](https://openairdocs.org/model/gulfstream-am-corp-comm-div-690c): 14 aircraft (airframe model)
- [Gulfstream AM Corp Comm Div 690D](https://openairdocs.org/model/gulfstream-am-corp-comm-div-690d): 12 aircraft (airframe model)
- [Rockwell International 695](https://openairdocs.org/model/rockwell-international-695): 12 aircraft (airframe model)
- [Aero Commander 690](https://openairdocs.org/model/aero-commander-690): 3 aircraft (airframe model)
- [Twin Commander 690C](https://openairdocs.org/model/twin-commander-690c): 2 aircraft (airframe model)
- [Gulfstream Aerospace 695A](https://openairdocs.org/model/gulfstream-aerospace-695a): 2 aircraft (airframe model)
- [Gulfstream AM Corp Comm Div 695](https://openairdocs.org/model/gulfstream-am-corp-comm-div-695): 1 aircraft (airframe model)
- [Twin Commander 690B](https://openairdocs.org/model/twin-commander-690b): 1 aircraft (airframe model)

All 13 models: https://openairdocs.org/ad/84-19-05/models.md
Every aircraft: https://openairdocs.org/ad/84-19-05/aircraft.md

Its text cites no advisory circulars or STCs.

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