AD 85-12-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-100 Series | BOEING Model 737-100 and -200 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | BOEING Model 737-100 and -200 Series Airplanes |
Unsafe Condition
Engine flameouts during climb due to incompatible fuel types in airplanes equipped with Plessey Type 8240 Mark 1, 2, or 3 boost pumps.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Ensure use of Jet A/A1 (ASTM-D-1655) or JP-5 (MIL-T-5624) fuel before further flight. Incorporate approved fuel information into the Airplane Flight Manual within 48 hours. Alternate compliance may be approved by the FAA Manager, Seattle Aircraft Certification Office.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight (for fuel use) and within 48 hours (for AFM update).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 737-100 and -200 series airplanes with Plessey Type 8240 Mark 1, 2, or 3 boost pumps.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Approved Fuel
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_85-12-51.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 85-12-51 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 737-100 and -200 Series Airplanes Subject: Approved Fuel Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/06/1985 Make: The Boeing Company Model: 737-100 Series | 737-200 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 85-12-51 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5104 AD NUMBER: 85-12-51 SUBJECT HEADING: BOEING Model 737-100 and -200 Series Airplanes ACTION: SUMMARY: DATES: Effective August 6, 1985. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 85-12-51 BOEING: Amendment 39-5104. Applies to Model 737-100 and -200 series airplanes equipped with Plessey Type 8240 Mark 1, 2, or 3 boost pumps and certificated in any category. To prevent engine flameouts during climb, accomplish the following, unless already accomplished: 1. Before further flight ensure that the fuel being used is one of the following types: o Jet A or A1 conforming to specification ASTM-D-1655; or o JP-5 conforming to MIL-T-5624. 2. Within 48 hours incorporate the following information into the Limitations Section of the Airplane Flight Manual and provide to crews: "The only approved fuels are Jet A and A1 conforming to Specification ASTM- D-1655, and JP-5 conforming to MIL-T-5624." 3. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. NOTE: Compliance with Paragraph 2. of this directive may be effected by including a copy of this AD in the Airplane Flight Manual and Operating Manual. This amendment becomes effective August 6, 1985. It was effective earlier to all recipients of telegraphic AD T85-12-51, issued June 13, 1985, which contained this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_85-12-51.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 85-12-51 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: BOEING Model 737-100 and -200 Series Airplanes Subject: Approved Fuel Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 08/06/1985 Make: The Boeing Company Model: 737-100 Series | 737-200 Series Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 85-12-51 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-5104 AD NUMBER: 85-12-51 SUBJECT HEADING: BOEING Model 737-100 and -200 Series Airplanes ACTION: SUMMARY: DATES: Effective August 6, 1985. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 85-12-51 BOEING: Amendment 39-5104. Applies to Model 737-100 and -200 series airplanes equipped with Plessey Type 8240 Mark 1, 2, or 3 boost pumps and certificated in any category. To prevent engine flameouts during climb, accomplish the following, unless already accomplished: 1. Before further flight ensure that the fuel being used is one of the following types: o Jet A or A1 conforming to specification ASTM-D-1655; or o JP-5 conforming to MIL-T-5624. 2. Within 48 hours incorporate the following information into the Limitations Section of the Airplane Flight Manual and provide to crews: "The only approved fuels are Jet A and A1 conforming to Specification ASTM- D-1655, and JP-5 conforming to MIL-T-5624." 3. Alternate means of compliance which provide an acceptable level of safety may be used when approved by the Manager, Seattle Aircraft Certification Office, FAA, Northwest Mountain Region. NOTE: Compliance with Paragraph 2. of this directive may be effected by including a copy of this AD in the Airplane Flight Manual and Operating Manual. This amendment becomes effective August 6, 1985. It was effective earlier to all recipients of telegraphic AD T85-12-51, issued June 13, 1985, which contained this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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