# AD 70-06-03: Takeoff Warning System/Automatic Speed Brake Retraction System - Type: Airworthiness directive - Status: Current - Products: Boeing 737-100 Series, 737-200 Series, 737-200C Series, 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series and 737-800 Series - Effective: March 13, 1970 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-952 - Registered aircraft: 823 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/885FC3E5C2F7A8EA86256831006B575A.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/70-06-03 ## The airworthiness directive 70-06-03 BOEING 737 SERIES AIRPLANES: Amdt. 39-952. Applies to Boeing 737 series listed in Boeing Service Bulletin 27-1031 dated 22 August 1969 and Revision 2 dated 27 January 1970, or later FAA-approved revisions. Compliance required as indicated. To provide for proper operation of the takeoff warning system and automatic speed brake retraction system at temperatures down to minus 65 degrees F, accomplish the following: (a) Within 50 hours time in service after the effective date of this AD, unless already accomplished, install a placard in the cockpit in full view of the pilot to read: "DO NOT USE AUTOMATIC SPOILER DEPLOYMENT AT AMBIENT TEMPERATURES BELOW ZERO DEGREES FAHRENHEIT." This placard may be removed when Item (b) is accomplished. (b) Within 1000 hours time in service after the effective date of this AD, unless previously accomplished, replace the takeoff warning switch actuating cam with a modified cam and accomplish the rigging procedures for proper alignment of the power lever knobs in the throttle control system with the warning switch in accordance with Boeing Service Bulletin 27- 1031 dated 2 August 1969, and Revision 2 dated 27 January 1970, or later FAA approved revisions, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region. NOTE: The manufacturer is currently providing AFM revisions to operators relating to the characteristics of the warning system. Operators should incorporate this information in their manuals immediately upon receipt. This amendment becomes effective on March 13, 1970. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A16WE](https://openairdocs.org/tcds/A16WE): The Boeing Company; names 9 of 17 models: 737-500 Series, 737-100 Series, 737-200C Series, 737-800 Series, 737-300 Series, 737-200 Series, 737-700 Series, 737-400 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: 823 (823 by airframe model, 0 by engine model) - Makers: Boeing 823 Models with the most aircraft: - [Boeing 737-823](https://openairdocs.org/model/boeing-737-823): 278 aircraft (airframe model) - [Boeing 737-800](https://openairdocs.org/model/boeing-737-800): 139 aircraft (airframe model) - [Boeing 737-824](https://openairdocs.org/model/boeing-737-824): 135 aircraft (airframe model) - [Boeing 737-832](https://openairdocs.org/model/boeing-737-832): 73 aircraft (airframe model) - [Boeing 737-890](https://openairdocs.org/model/boeing-737-890): 60 aircraft (airframe model) - [Boeing 737-724](https://openairdocs.org/model/boeing-737-724): 36 aircraft (airframe model) - [Boeing 737-790](https://openairdocs.org/model/boeing-737-790): 14 aircraft (airframe model) - [Boeing 737-752](https://openairdocs.org/model/boeing-737-752): 13 aircraft (airframe model) - [Boeing 737-400](https://openairdocs.org/model/boeing-737-400): 8 aircraft (airframe model) - [Boeing 737-852](https://openairdocs.org/model/boeing-737-852): 7 aircraft (airframe model) - [Boeing 737-500](https://openairdocs.org/model/boeing-737-500): 6 aircraft (airframe model) - [Boeing 737-436](https://openairdocs.org/model/boeing-737-436): 6 aircraft (airframe model) - [Boeing 737-700](https://openairdocs.org/model/boeing-737-700): 5 aircraft (airframe model) - [Boeing 737-300](https://openairdocs.org/model/boeing-737-300): 4 aircraft (airframe model) - [Boeing 737-883](https://openairdocs.org/model/boeing-737-883): 4 aircraft (airframe model) - [Boeing 737-205](https://openairdocs.org/model/boeing-737-205): 3 aircraft (airframe model) - [Boeing 737-490](https://openairdocs.org/model/boeing-737-490): 3 aircraft (airframe model) - [Boeing 737-484](https://openairdocs.org/model/boeing-737-484): 3 aircraft (airframe model) - [Boeing 737-732](https://openairdocs.org/model/boeing-737-732): 3 aircraft (airframe model) - [Boeing 737-524](https://openairdocs.org/model/boeing-737-524): 3 aircraft (airframe model) All 40 models: https://openairdocs.org/ad/70-06-03/models.md Every aircraft: https://openairdocs.org/ad/70-06-03/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.