# AD 84-10-07: Emergency LG Extension System Modification

- Type: Airworthiness directive
- Status: Current
- Products: Twin Commander 680-T, 680-V, 680-W and 681
- Effective: June 23, 2011
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-4868
- Registered aircraft: 14 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EF9252DD97EE0D6686256A4D0047B7CF.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/84-10-07

## The airworthiness directive

84-10-07 GULFSTREAM AEROSPACE CORPORATION (AERO COMMANDER): Amendment 39-4868. Applies to Models 680T, 680V, and 680W (S/N's 1473 through 1850) and Model 681 (S/N's 6001 through 6017, 6020 through 6038, 6040 through 6042, and 6048) airplanes certificated in any category unless Service Bulletin 102 dated March 1, 1971, or Service Bulletin 102A dated September 1, 1983, has previously been accomplished.

Compliance: Required within the next 100 hours time-in-service after the effective date of this AD unless already accomplished.

To assure proper operation of the emergency landing gear extension system, accomplish the following: (a) Modify the emergency landing gear extension system in accordance with Gulfstream Aerospace Corporation, Commander Division, Service Bulletin 102A, dated September 1, 1983.

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

  (c) An equivalent method of compliance with this AD may be used ifapproved by the Manager, Airplane Certification Branch, ASW-150, FAA, Southwest Region, P.O. Box 1689, Fort Worth, Texas 76101.

This amendment becomes effective on June 23, 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 4 of 21 models: 680-V, 680-W, 681, 680-T

## 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: 14 (14 by airframe model, 0 by engine model)
- Makers: Aero Commander 14

Models with the most aircraft:

- [Aero Commander 681](https://openairdocs.org/model/aero-commander-681): 6 aircraft (airframe model)
- [Aero Commander 680W](https://openairdocs.org/model/aero-commander-680w): 4 aircraft (airframe model)
- [Aero Commander 680T](https://openairdocs.org/model/aero-commander-680t): 2 aircraft (airframe model)
- [Aero Commander 680V](https://openairdocs.org/model/aero-commander-680v): 2 aircraft (airframe model)

All 4 models: https://openairdocs.org/ad/84-10-07/models.md
Every aircraft: https://openairdocs.org/ad/84-10-07/aircraft.md

Its text cites no advisory circulars or STCs.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.