# AD 77-13-04: Placard-Brake Warning

- Type: Airworthiness directive
- Status: Current
- Products: Allied Ag Cat Productions G-164A, G-164B, G-164B-15T, G-164B-20T, G-164B-34T and G-164B (with 73 inch wing gap)
- Effective: June 29, 1977
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-2931
- Registered aircraft: 481 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C46D3FF93B15171E86256A540070346D.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/77-13-04

## The airworthiness directive

77-13-04 GRUMMAN-AMERICAN: Amendment 39-2931. Applies to G-164B, S/N's 138B, 142B, 177B and up, and G-164A, S/N's 1686, 1695 and up, certificated in all categories.

Accomplish the following, unless previously accomplished:

a) Before further flight, install a placard adjacent to the parking brake handle stating: "Warning - Parking Brake OFF Prior to Landing."

b) Within the next 50 hours in service, install the alteration defined in Grumman American Aviation Corporation Service Bulletin No. 60, dated May 20, 1977, or an equivalent method approved by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region. When this is accomplished, the warning placard may be removed.

This Amendment becomes effective June 29, 1977.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 1A16](https://openairdocs.org/tcds/1A16): Allied Ag Cat Productions Inc.; names 5 of 10 models: G-164B, G-164B-20T, G-164A, G-164B-34T, G-164B-15T

## 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: 481 (481 by airframe model, 0 by engine model)
- Makers: Grumman Acft ENG Cor-Schweizer 307, Grumman 65, Schweizer 62, Gulfstream-Schweizer A/C 33, Grumman American Avn. 9, Ag-Cat 5

Models with the most aircraft:

- [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b): 157 aircraft (airframe model)
- [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a): 150 aircraft (airframe model)
- [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a): 63 aircraft (airframe model)
- [Schweizer G-164B](https://openairdocs.org/model/schweizer-g-164b): 56 aircraft (airframe model)
- [Gulfstream-Schweizer A/C GULFSTREAM AM G-164B](https://openairdocs.org/model/gulfstream-schweizer-a-c-gulfstream-am-g-164b): 33 aircraft (airframe model)
- [Grumman American Avn. G-164B](https://openairdocs.org/model/grumman-american-avn-g-164b): 6 aircraft (airframe model)
- [Ag-Cat G-164B](https://openairdocs.org/model/ag-cat-g-164b): 5 aircraft (airframe model)
- [Grumman American Avn. G-164A](https://openairdocs.org/model/grumman-american-avn-g-164a): 3 aircraft (airframe model)
- [Schweizer G-164B-20T](https://openairdocs.org/model/schweizer-g-164b-20t): 3 aircraft (airframe model)
- [Grumman G-164B](https://openairdocs.org/model/grumman-g-164b): 2 aircraft (airframe model)
- [Schweizer G164B-34T](https://openairdocs.org/model/schweizer-g164b-34t): 2 aircraft (airframe model)
- [Schweizer G164A](https://openairdocs.org/model/schweizer-g164a): 1 aircraft (airframe model)

All 13 models: https://openairdocs.org/ad/77-13-04/models.md
Every aircraft: https://openairdocs.org/ad/77-13-04/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.