# AD 91-05-11: AFM Changes - Extended Range - Type: Airworthiness directive - Status: Current - Products: Boeing 737-300 Series - Effective: March 26, 1991 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-6909 - Docket: 90-NM-196-AD - Registered aircraft: 8 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/449D289B0B55498186256960007244A4.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/91-05-11 ## The airworthiness directive 91-05-11 BOEING: Amendment 39-6909. Docket No. 90-NM-196-AD. Applicability: Model 737-300 series airplanes, equipped with CFM56-3 series engines, certificated in any category. Compliance: Required as indicated, unless previously accomplished. To reduce the risk of total engine thrust loss due to unavoidable severe weather penetration during an ETOPS single engine diversion, accomplish the following: A. Within the next 30 days after June 12, 1989 (the effective date of Amendment 39-6247), delete from the FAA-approved Airplane Flight Manual (AFM) any reference to approval or suitability of the Model 737-300 airplane for use in extended range operation. This may be accomplished by replacing the existing AFM page(s) containing the Extended Range Operations suitability statement with a page(s) which has that statement deleted. If the existing AFM does not contain such a statement, then no action is necessary. B. A new AFM ETOPS suitability statement, outlined below, may be inserted into the FAA-approved AFM when the airplane has been configured in accordance with Boeing Document D6-38123, Revision A, dated September 14, 1990, "Configuration, Maintenance and Procedures for Extended Range Operation" (CMP): EXTENDED RANGE OPERATIONS The type design reliability and performance of this airplane/engine combination has been evaluated in accordance with FAA Advisory Circular 120-42A and found suitable for extended range operations when configured in accordance with FAA-approved Boeing Document D6- 38123, Revision A, dated September 14, 1990, "Configuration, Maintenance and Procedures for Extended Range (ER) Operation." This finding does not constitute approval to conduct extended range operations. C. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Seattle Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate. NOTE: The request should be submitted directly to the Manager, Seattle ACO, and a copy sent to the cognizant FAA Principal Inspector (PI). The PI will then forward comments or concurrence to the Seattle ACO. D. Special flight permits may be issued in accordance with FAR 21.197 and 21.199 to operate airplanes to a base in order to comply with the requirements of this AD. All persons affected by this directive who have not already received the appropriate service documents from the manufacturer may obtain copies upon request to Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. These documents may be examined at the FAA, Northwest Mountain Region, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington. Airworthiness Directive 91-05-11 supersedes AD 89-13-06, Amendment 39-6247. This amendment (39-6909, AD 91-05-11) becomes effective on March 26, 1991. ## 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 1 of 17 models: 737-300 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: 8 (8 by airframe model, 0 by engine model) - Makers: Boeing 8 Models with the most aircraft: - [Boeing 737-300](https://openairdocs.org/model/boeing-737-300): 4 aircraft (airframe model) - [Boeing 737-301](https://openairdocs.org/model/boeing-737-301): 1 aircraft (airframe model) - [Boeing 737-306](https://openairdocs.org/model/boeing-737-306): 1 aircraft (airframe model) - [Boeing 737-319](https://openairdocs.org/model/boeing-737-319): 1 aircraft (airframe model) - [Boeing 737-330](https://openairdocs.org/model/boeing-737-330): 1 aircraft (airframe model) All 5 models: https://openairdocs.org/ad/91-05-11/models.md Every aircraft: https://openairdocs.org/ad/91-05-11/aircraft.md ## Related documents - [AC 120-42B](https://openairdocs.org/ac/120-42): Extended Operations (ETOPS and Polar Operations). Cited as AC 120-42A in the AD's requirements --- 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.