# AD 91-13-10 R1: EICAS Computer - Type: Airworthiness directive - Status: Current - Products: Boeing 747-100 Series, 747-100B Series, 747-100B SUD Series, 747-200B Series, 747-200C Series, 747-200F Series, 747-300 Series, 747-400 Series, 747-400D Series, 747-400F Series, 747SP Series, 747SR Series and 3 more - Effective: February 26, 1992 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Large airplane - Amendment: 39-8158 - Docket: 91-NM-241-AD - Registered aircraft: 465 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6CE4A557F98B6213862569610072D4A2.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/91-13-10-R1 ## The airworthiness directive 91-13-10 R1 BOEING: Amendment 39-8158. Docket No. 91-NM-241-AD. Revises AD 91-13-10, Amendment 39- 7041. Applicability: Model 747 series airplanes equipped with Pratt and Whitney PW4000 engines; and Model 767 series airplanes equipped with Pratt and Whitney PW4000, General Electric CF6-80C2-B2F, or General Electric CF6- 80C2-B6F series engines; certificated in any category. Compliance: Required as indicated, unless previously accomplished. To prevent overspeed or uncommanded shutdown of an engine, accomplish the following: (a) For Model 747 series airplanes equipped with Pratt and Whitney PW4000 engines, and Model 767 series airplanes equipped with Pratt and Whitney PW4000 or General Electric CF6-80C2-B6F engines: Within 3 days after May 22, 1989 (the effective date of Amendment 39-6210), add the following to the Limitations Section of the FAA- approved Airplane Flight Manual (AFM). This may be accomplished by inserting a copy of this AD in the AFM. "Prior to each departure, with all engines running, refer to the EICAS status page and determine the dispatch capability of the aircraft." (b) Within the next 24 months after August 12, 1991 (the effective date of this Amendment 39-7041), replace the EICAS computers in accordance with the appropriate service bulletin listed below. After replacement of the EICAS computers in accordance with the specified service bulletins, the AFM limitation required by paragraph (a) of this AD may be removed. (1) For Model 747 series airplanes listed in Boeing Service Bulletin 747-31-2151, dated March 29, 1990. (2) For Model 767 series airplanes equipped with Pratt and Whitney PW4000 engines listed in Boeing Service Bulletin 767-31-0033, Revision 1, dated September 27, 1990. (3) For Model 767 series airplanes equipped with General Electric CF6-80C2-B6F engines listed in Boeing Service Bulletin 767-31-0038, dated April 12, 1990. (c) For Model 767 series airplanes equipped with General Electric CF6-80C2-B2F engines: (1) Within the next 3 days after the effective date of this AD, add the following to the Limitations Section of the FAA-approved Airplane Flight Manual (AFM). This may be accomplished by inserting a copy of this AD in the AFM. "Prior to each departure, with all engines running, refer to the EICAS status page and determine the dispatch capability of the aircraft." (2) Within the next 24 months after the effective date of this AD, replace the EICAS computers in accordance with Boeing Service Bulletin 767-31-0038, dated April 12, 1990. After incorporation of the EICAS computers, the AFM limitation required by paragraph (c)(1) may be removed. (d) For airplanes not subject to paragraph (b) or (c) of this AD, within the next 30 days after the effective date of this AD, remove the AFM limitation required by paragraph (a) of this AD. (e) An alternative method of compliance or adjustment of the compliance time, which provides anacceptable 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 forwarded through an FAA Principal Maintenance Inspector, who may concur or comment and then send it to the Manager, Seattle ACO. (f) 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. (g) The replacement requirements shall be done in accordance with the following Boeing Service Bulletins, which incorporate the following list of affected pages: Service Bulletin Revision Level Date Pages 747-31-2151 Original March 29, 1990 1 - 10 767-31-0033 1 Original September 27, 1990 May 31, 1990 1, 2, 4, 5 3, 6, 7, 8, 9, 10 767-31-0038 Original April 12, 1990 1 - 8 This incorporation by reference was approved by the Director of the Federal Register inaccordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Boeing Commercial Airplane Group, P.O. Box 3707, Seattle, Washington 98124. Copies may be inspected at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, Washington; or at the Office of the Federal Register, 1100 L Street NW., Room 8401, Washington, D.C. (h) Airworthiness Directive 91-13-10 superseded AD 89-10-06, Amendment 39-6210. (i) This Airworthiness Directive 91-13-10 R1 revises AD 91-13-10, Amendment 39-7041. (j) This amendment (39-8158, AD 91-13-10 R1) becomes effective on February 26, 1992. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS A20WE](https://openairdocs.org/tcds/A20WE): The Boeing Company; names 12 of 14 models: 747-100B Series, 747SP Series, 747-400D Series, 747-400F Series, 747-200B Series, 747-200F Series, 747-300 Series, 747-200C Series… - [TCDS A1NM](https://openairdocs.org/tcds/A1NM): The Boeing Company; names 3 of 5 models: 767-300 Series, 767-200 Series, 767-300F 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: 465 (465 by airframe model, 0 by engine model) - Makers: Boeing 465 Models with the most aircraft: - [Boeing 767-300F](https://openairdocs.org/model/boeing-767-300f): 169 aircraft (airframe model) - [Boeing 767-332](https://openairdocs.org/model/boeing-767-332): 46 aircraft (airframe model) - [Boeing 767-322](https://openairdocs.org/model/boeing-767-322): 36 aircraft (airframe model) - [Boeing 767-323](https://openairdocs.org/model/boeing-767-323): 27 aircraft (airframe model) - [Boeing 767-338](https://openairdocs.org/model/boeing-767-338): 13 aircraft (airframe model) - [Boeing 767-316](https://openairdocs.org/model/boeing-767-316): 12 aircraft (airframe model) - [Boeing 767-346](https://openairdocs.org/model/boeing-767-346): 11 aircraft (airframe model) - [Boeing 747-446](https://openairdocs.org/model/boeing-747-446): 10 aircraft (airframe model) - [Boeing 767-281](https://openairdocs.org/model/boeing-767-281): 9 aircraft (airframe model) - [Boeing 747-422](https://openairdocs.org/model/boeing-747-422): 8 aircraft (airframe model) - [Boeing 767-381](https://openairdocs.org/model/boeing-767-381): 8 aircraft (airframe model) - [Boeing 767-232](https://openairdocs.org/model/boeing-767-232): 6 aircraft (airframe model) - [Boeing 767-319](https://openairdocs.org/model/boeing-767-319): 6 aircraft (airframe model) - [Boeing 747-412](https://openairdocs.org/model/boeing-747-412): 5 aircraft (airframe model) - [Boeing 767-306](https://openairdocs.org/model/boeing-767-306): 5 aircraft (airframe model) - [Boeing 767-224](https://openairdocs.org/model/boeing-767-224): 5 aircraft (airframe model) - [Boeing 767-300](https://openairdocs.org/model/boeing-767-300): 5 aircraft (airframe model) - [Boeing 767-316F](https://openairdocs.org/model/boeing-767-316f): 5 aircraft (airframe model) - [Boeing 747-400F](https://openairdocs.org/model/boeing-747-400f): 4 aircraft (airframe model) - [Boeing 747-409](https://openairdocs.org/model/boeing-747-409): 4 aircraft (airframe model) All 60 models: https://openairdocs.org/ad/91-13-10-R1/models.md Every aircraft: https://openairdocs.org/ad/91-13-10-R1/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.