# AD 64-12-01: Throttle Control System - Type: Airworthiness directive - Status: Current - Products: Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body, 707-200, 707-300 Series, 707-300B Series, 707-300C Series, 707-400 Series, 720 Series and 720B Series - Effective: August 5, 1964 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Registered aircraft: 6 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/15C4D91E93B24EE986256992004FE40C.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/64-12-01 ## The airworthiness directive 64-12-01 BOEING: Amdt. 733 Part 507 Federal Register May 23, 1964. Applies to All Models 707 and 720 Series Aircraft Equipped With Pratt & Whitney JT3D-1, -3 or -3B Engines. Compliance required as indicated. To prevent inadvertent inflight reversals caused by snap action closing of the throttles to the idle position accomplish the following: (a) Within 500 hours' time in service after the effective date of this AD, unless already accomplished, rerig the throttle control system in accordance with the Boeing Maintenance Manual dated April 1964, or Boeing Service Letter 6-7161-4-6112 dated September 30, 1963. (b) Within 2,500 hours' time in service after the effective date of this AD, unless already accomplished, accomplish the following: (1) Inspect the strut mounted bracket in accordance with Service Bulletin No. 1659 (R-1) to determine what bracket assembly part number is installed on each airplane reverser installation. (2) Modify the cam rocker arm, P/N 69-10814, in accordance with Boeing Service Bulletin No. 1931 or an FAA approved equivalent. This modification shall be accomplished prior to or concurrent with the thrust reverser directional control valve cam modification required in paragraph (b)(3). Installation of a modified cam with an unmodified cam rocker arm is prohibited because of operational incompatibility and subsequent possible interference. (3) Modify the thrust reverser directional control valve cam assembly, P/N's 65- 18225-1, -2, -3 or 65-27438-3, in accordance with Boeing Service Bulletin No. 1931 or an FAA approved equivalent. Models 707 and 720 fan engine airplanes may have any one of or a combination of the thrust reverser directional control valve cam assembly part numbers listed above. Interchangeability of these directional control valve cam assemblies with strut mounted brackets and fan reverser followup cams are as follows: (i) Cam assemblies P/N's 65-18225-2, -3, and 65-27438-3, all reworked in accordance with Service Bulletin No. 1931 must be used with bracket assembly P/N's 65-11882-2 or -4 or P/N 65-11882 reworked in accordance with Service Bulletin No. 1659(R-1). (ii) Cam assembly P/N 65-18225-1 reworked in accordance with Service Bulletin No. 1931 must be used with bracket P/N's 65-11882, -2, or -4 or P/N 65-11882 reworked in accordance with Service Bulletin No. 1659(R-1). (iii) Cam assemblies P/N 65-27438-3 reworked per Service Bulletin 1931 shall be used with fan reverser followup cams P/N's 65-27437-1 or 66-16560-1. (iv) Cam assemblies P/N's 65-18225-1, -2 or -3 reworked per Service Bulletin 1931 shall be used with fan reverser followup cam P/N's 65-11826-3 or -7. (c) Approval of any equivalent means shall be processed through the Aircraft Engineering Division, FAA Western Region, Los Angeles, California. (Boeing Service Bulletins Nos. 1659(R-1) and 1931 cover this subject.) This directive effective June 26, 1964. Revised August 5, 1964. ## Affected data sheets (3) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 4A21](https://openairdocs.org/tcds/4A21): The Boeing Company; names 4 of 4 models: 707-100B Short Body, 707-200, 707-100 Long Body, 707-100B Long Body - [TCDS 4A26](https://openairdocs.org/tcds/4A26): The Boeing Company; names 4 of 4 models: 707-300B Series, 707-400 Series, 707-300 Series, 707-300C Series - [TCDS 4A28](https://openairdocs.org/tcds/4A28): The Boeing Company; names 2 of 2 models: 720B Series, 720 Series ## 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: 6 (6 by airframe model, 0 by engine model) - Makers: Boeing 6 Models with the most aircraft: - [Boeing 707-338C](https://openairdocs.org/model/boeing-707-338c): 2 aircraft (airframe model) - [Boeing 707-368C](https://openairdocs.org/model/boeing-707-368c): 1 aircraft (airframe model) - [Boeing 707-321B](https://openairdocs.org/model/boeing-707-321b): 1 aircraft (airframe model) - [Boeing 707-323B](https://openairdocs.org/model/boeing-707-323b): 1 aircraft (airframe model) - [Boeing 707-351B](https://openairdocs.org/model/boeing-707-351b): 1 aircraft (airframe model) All 5 models: https://openairdocs.org/ad/64-12-01/models.md Every aircraft: https://openairdocs.org/ad/64-12-01/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.