AD 72-11-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Grumman American Aviation Corporation | G-21 | Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes |
| aircraft | Grumman American Aviation Corporation | G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) | Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes |
Unsafe Condition
Engine fuel starvation due to fuel vaporization within fuel feed lines to the engines.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a permanent placard on or near the instrument panel in full view of the pilot using minimum 1/8 inch lettering stating 'Cross feed valve must be closed during all flight operations except for emergencies resulting from engine pump failure'.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Grumman Aircraft Model G-21 and G-21A (converted military OA-9 and JRF series airplanes under TC 654)
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Engine Fuel Starvation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_72-11-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-11-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes Subject: Engine Fuel Starvation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/30/1972 Make: Grumman American Aviation Corporation Model: G-21 | G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 72-11-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1451 AD NUMBER: 72-11-03 SUBJECT HEADING: Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes ACTION: SUMMARY: DATES: Effective May 30, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-11-03 GRUMMAN AIRCRAFT: Amdt. 39-1451. Applies to G-21 and G-21A airplanes (converted military OA-9 and JRF series airplanes under TC 654) certificated in all categories. Compliance required within the next 25 hours in service after the effective date of this AD, unless already accomplished. In order to prevent engine fuel starvation due to fuel vaporization within fuel feed lines to the engines, accomplish the following: Install a permanent placard on or near the instrument panel in full view of the pilot using minimum 1/8 inch lettering to read: "Cross feed valve must be closed during all flight operations except for emergencies resulting from engine pump failure." (Grumman Customer Bulletin No. G21A 72-1 pertains to this subject) This amendment is effective May 30, 1972. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_72-11-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 72-11-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes Subject: Engine Fuel Starvation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/30/1972 Make: Grumman American Aviation Corporation Model: G-21 | G-21A (Army OA-9, Navy JRF-1, -2, -3, -4, -5, and -6B) Product Type: Aircraft Product Subtype: Small 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: 72-11-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1451 AD NUMBER: 72-11-03 SUBJECT HEADING: Airworthiness Directives; Grumman Aircraft Model G-21 and G-21A Airplanes ACTION: SUMMARY: DATES: Effective May 30, 1972. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 72-11-03 GRUMMAN AIRCRAFT: Amdt. 39-1451. Applies to G-21 and G-21A airplanes (converted military OA-9 and JRF series airplanes under TC 654) certificated in all categories. Compliance required within the next 25 hours in service after the effective date of this AD, unless already accomplished. In order to prevent engine fuel starvation due to fuel vaporization within fuel feed lines to the engines, accomplish the following: Install a permanent placard on or near the instrument panel in full view of the pilot using minimum 1/8 inch lettering to read: "Cross feed valve must be closed during all flight operations except for emergencies resulting from engine pump failure." (Grumman Customer Bulletin No. G21A 72-1 pertains to this subject) This amendment is effective May 30, 1972. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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