# SAIB NM-07-12: Wire bundle W138 and add protection sleeves to the wire bundles for the equipment cooling blowers - Type: Special airworthiness information bulletin (advisory, not mandatory) - Status: Current - Revision: 0 - Issued: November 27, 2006 - Products: Boeing 737-100 Series, 737-200 Series, 737-300 Series, 737-400 Series and 737-500 Series - Product type: Aircraft, Large Airplane - PDF: https://openairdocs.org/files/sha256/9f/1e/9f1ee0b14605178a472203d7a8707c0ab9aa8f9b2886a973a60a4d0ae08292d3 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/93A62528E92E40D486257259006D7E91.0001 - DRS record last changed: January 4, 2007 - Page: https://openairdocs.org/saib/NM-07-12 ## Text FAA Aircraft Certification Service **SPECIAL AIRWORTHINESS** INFORMATION BULLETIN http://www.faa.gov/aircraft/safety/alerts/SAIB SAIB: NM-07-12 Date: November 27, 2006 This is information only. Recommendations aren’t mandatory. Introduction This Special Airworthiness Information Bulletin (SAIB) advises you, owners and operators of The Boeing Company Model 737-100, -200, -300, -400, and -500 aircraft to inspect the wire bundle W138 and add protection sleeves to the wire bundles for the equipment cooling blowers. Background This SAIB is prompted by reports that one operator experienced the illumination of the entire fire-warning panel. The left wing overheat light also illuminated. The crew reported that they were unable to silence the bell or extinguish the blinking lights. On the ground, maintenance found a significant section of wire bundle W138 behind the E3-4 shelf in the Electronic Equipment Bay completely burned away. The burned wires were a result of wire insulation damage caused by an electrical arc when the wires rubbed against the clamps on the cooling blowers. Recommendations We recommend that you incorporate Boeing Special Attention Service Bulletin (SASB) 737-24-1163 Revision 1, dated June 26, 2006. This SASB provides instructions for inspection of the wire bundles for the equipment cooling blowers between the blowers and the wire bundle breakout. You should repair the wire bundles if necessary, and install protection sleeves. For Further Information Contact Binh V. Tran, Aerospace Engineer, FAA Seattle Aircraft Certification Office, 1601 Lind Avenue, SW, Renton, WA 98055-4056; phone: (425) 917-6485; fax: (425) 917-6590; email: binh.tran@faa.gov. For Service Bulletin Information Contact Boeing Company at P.O. Box 3707, Seattle, WA 98124, or through the following website: https://www.myboeingfleet.com/boldweb/index .bhtml ## Registered aircraft it may concern (OpenAirDocs) Registry models matched by make and model, the same way as ADs, most registered aircraft first. - [Boeing 737-400](https://openairdocs.org/model/boeing-737-400): 8 registered aircraft (airframe model) - [Boeing 737-436](https://openairdocs.org/model/boeing-737-436): 6 registered aircraft (airframe model) - [Boeing 737-500](https://openairdocs.org/model/boeing-737-500): 6 registered aircraft (airframe model) - [Boeing 737-300](https://openairdocs.org/model/boeing-737-300): 4 registered aircraft (airframe model) - [Boeing 737-205](https://openairdocs.org/model/boeing-737-205): 3 registered aircraft (airframe model) - [Boeing 737-484](https://openairdocs.org/model/boeing-737-484): 3 registered aircraft (airframe model) - [Boeing 737-490](https://openairdocs.org/model/boeing-737-490): 3 registered aircraft (airframe model) - [Boeing 737-524](https://openairdocs.org/model/boeing-737-524): 3 registered aircraft (airframe model) - [Boeing 737-505](https://openairdocs.org/model/boeing-737-505): 2 registered aircraft (airframe model) - [Boeing 737-200](https://openairdocs.org/model/boeing-737-200): 1 registered aircraft (airframe model) - [Boeing 737-201](https://openairdocs.org/model/boeing-737-201): 1 registered aircraft (airframe model) - [Boeing 737-209](https://openairdocs.org/model/boeing-737-209): 1 registered aircraft (airframe model) - [Boeing 737-301](https://openairdocs.org/model/boeing-737-301): 1 registered aircraft (airframe model) - [Boeing 737-306](https://openairdocs.org/model/boeing-737-306): 1 registered aircraft (airframe model) - [Boeing 737-319](https://openairdocs.org/model/boeing-737-319): 1 registered aircraft (airframe model) - [Boeing 737-330](https://openairdocs.org/model/boeing-737-330): 1 registered aircraft (airframe model) - [Boeing 737-401](https://openairdocs.org/model/boeing-737-401): 1 registered aircraft (airframe model) - [Boeing 737-405](https://openairdocs.org/model/boeing-737-405): 1 registered aircraft (airframe model) - [Boeing 737-528](https://openairdocs.org/model/boeing-737-528): 1 registered aircraft (airframe model) - [Boeing 737-112](https://openairdocs.org/model/boeing-737-112): 0 registered aircraft (airframe model) - [Boeing 737-130](https://openairdocs.org/model/boeing-737-130): 0 registered aircraft (airframe model) - [Boeing 737-204](https://openairdocs.org/model/boeing-737-204): 0 registered aircraft (airframe model) - [Boeing 737-212](https://openairdocs.org/model/boeing-737-212): 0 registered aircraft (airframe model) - [Boeing 737-214](https://openairdocs.org/model/boeing-737-214): 0 registered aircraft (airframe model) - [Boeing 737-217](https://openairdocs.org/model/boeing-737-217): 0 registered aircraft (airframe model) - [Boeing 737-219](https://openairdocs.org/model/boeing-737-219): 0 registered aircraft (airframe model) - [Boeing 737-222](https://openairdocs.org/model/boeing-737-222): 0 registered aircraft (airframe model) - [Boeing 737-228](https://openairdocs.org/model/boeing-737-228): 0 registered aircraft (airframe model) - [Boeing 737-229](https://openairdocs.org/model/boeing-737-229): 0 registered aircraft (airframe model) - [Boeing 737-230](https://openairdocs.org/model/boeing-737-230): 0 registered aircraft (airframe model) - [Boeing 737-232](https://openairdocs.org/model/boeing-737-232): 0 registered aircraft (airframe model) - [Boeing 737-236](https://openairdocs.org/model/boeing-737-236): 0 registered aircraft (airframe model) - [Boeing 737-241](https://openairdocs.org/model/boeing-737-241): 0 registered aircraft (airframe model) - [Boeing 737-242](https://openairdocs.org/model/boeing-737-242): 0 registered aircraft (airframe model) - [Boeing 737-244](https://openairdocs.org/model/boeing-737-244): 0 registered aircraft (airframe model) - [Boeing 737-247](https://openairdocs.org/model/boeing-737-247): 0 registered aircraft (airframe model) - [Boeing 737-248](https://openairdocs.org/model/boeing-737-248): 0 registered aircraft (airframe model) - [Boeing 737-258](https://openairdocs.org/model/boeing-737-258): 0 registered aircraft (airframe model) - [Boeing 737-260](https://openairdocs.org/model/boeing-737-260): 0 registered aircraft (airframe model) - [Boeing 737-266](https://openairdocs.org/model/boeing-737-266): 0 registered aircraft (airframe model) - [Boeing 737-268](https://openairdocs.org/model/boeing-737-268): 0 registered aircraft (airframe model) - [Boeing 737-269](https://openairdocs.org/model/boeing-737-269): 0 registered aircraft (airframe model) - [Boeing 737-275](https://openairdocs.org/model/boeing-737-275): 0 registered aircraft (airframe model) - [Boeing 737-277](https://openairdocs.org/model/boeing-737-277): 0 registered aircraft (airframe model) - [Boeing 737-281](https://openairdocs.org/model/boeing-737-281): 0 registered aircraft (airframe model) - [Boeing 737-282](https://openairdocs.org/model/boeing-737-282): 0 registered aircraft (airframe model) - [Boeing 737-284](https://openairdocs.org/model/boeing-737-284): 0 registered aircraft (airframe model) - [Boeing 737-286](https://openairdocs.org/model/boeing-737-286): 0 registered aircraft (airframe model) - [Boeing 737-287](https://openairdocs.org/model/boeing-737-287): 0 registered aircraft (airframe model) - [Boeing 737-291](https://openairdocs.org/model/boeing-737-291): 0 registered aircraft (airframe model) All 80: https://openairdocs.org/saib/NM-07-12/models.md --- 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.