# AD 78-23-11: Aileron Balance Cables - Type: Airworthiness directive - Status: Current - Products: Allied Ag Cat Productions G-164, G-164A, G-164B, G-164B-15T, G-164B-20T, G-164B-34T, G-164B (with 73 inch wing gap) and G-164C - Effective: February 28, 1979 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-3420 - Registered aircraft: 558 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9AB5F319CF0FA21A86256E120055AB24.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/78-23-11 ## The airworthiness directive 78-23-11 GRUMMAN: Amendment 39-3341 as amended by amendment 39-3420. Applies to Grumman G-164 S/N's 1 thru 400, G-164A S/N's 401 and up, G-164B S/N's 01B and up, G-164C S/N's 01C and up, certificated in all categories. Compliance is required as indicated. To detect aileron balance cables containing broken wires, P/N's A1860-101 and A1860-401 at the wing root pulley, accomplish the following: (a) Within the next 50 hours in service after the effective date of this AD, unless already accomplished within the last 550 hours, inspect the aileron cables for broken wires where they cross the pulley near the right and left wing roots. (b) Within the next 600 hours in service after the compliance with paragraph (a) of this AD, and within every 600 hours in service thereafter, repeat the inspection of paragraph (a). (c) Replace cables containing broken wires, prior to next flight, with unused cables of the same part number or with an approved equivalent. (d) Equivalent parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (e) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection intervals in this AD. (f) The aircraft may be flown in accordance with FAR 21.197 to a location where the AD can be accomplished. (Grumman American Ag-Cat Service Bulletin No. 63, dated October 6, 1978, is concerned with this subject.) Amendment 39-3341 was effective November 13, 1978. This amendment 39-3420 is effective February 28, 1979. ## 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 7 of 10 models: G-164B, G-164C, G-164, 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: 558 (558 by airframe model, 0 by engine model) - Makers: Grumman Acft ENG Cor-Schweizer 325, Grumman 119, Schweizer 63, Gulfstream-Schweizer A/C 33, Grumman American Avn. 12, Ag-Cat 5, Gulfstream Schweizer A/C 1 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) - [Grumman G-164](https://openairdocs.org/model/grumman-g-164): 52 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 Acft ENG Cor-Schweizer G-164C](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164c): 18 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-164](https://openairdocs.org/model/grumman-american-avn-g-164): 3 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 G164C](https://openairdocs.org/model/grumman-g164c): 2 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) - [Gulfstream Schweizer A/C GULFSTREAM AM G-164C](https://openairdocs.org/model/gulfstream-schweizer-a-c-gulfstream-am-g-164c): 1 aircraft (airframe model) - [Schweizer G164A](https://openairdocs.org/model/schweizer-g164a): 1 aircraft (airframe model) - [Schweizer G-164C](https://openairdocs.org/model/schweizer-g-164c): 1 aircraft (airframe model) All 19 models: https://openairdocs.org/ad/78-23-11/models.md Every aircraft: https://openairdocs.org/ad/78-23-11/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.