AD 73-25-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 310I | Airworthiness Directives; CESSNA Model 310I Airplanes |
Unsafe Condition
Possible sources of ignition in the wing leading edge area due to the heater fuel pump relay location.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Relocate the heater fuel pump relay from the wing leading edge to the inboard side of the third trailing edge wing rib assembly (wing station 47.83) outboard of the wing root rib, in accordance with Cessna Service Letter ME73-5, Supplement No. 2, or later FAA-approved revisions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 25 hours' time 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
Cessna Model 310I airplanes with serial numbers 310I-0001 thru 310I-0200
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Heater Fuel Pump Relay Relocation
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_73-25-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-25-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 310I Airplanes Subject: Heater Fuel Pump Relay Relocation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/10/1973 Make: Cessna Aircraft Company Model: 310I Product Type: Aircraft Product Subtype: Small Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 73-25-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1748 AD NUMBER: 73-25-01 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 310I Airplanes ACTION: SUMMARY: DATES: Effective December 10, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-25-01 CESSNA: Amdt. 39-1748. Applies to Model 310I (Serial Numbers 310I-0001 thru 310I-0200) airplanes. Compliance: Required as indicated, unless already accomplished. To remove possible sources of ignition in the wing leading edge area, within the next 25 hours' time in service after the effective date of this AD, accomplish the following: Relocate the heater fuel pump relay from the existing location in the wing leading edge to the inboard side of the third trailing edge wing rib assembly (wing station 47.83) outboard of the wing root rib in accordance with Cessna Service Letter ME73-5, Supplement No. 2, incorporating Cessna Service Kit SK 310-90A, or later FAA-approved revisions or any other modification approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective December 10, 1973. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_73-25-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 73-25-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; CESSNA Model 310I Airplanes Subject: Heater Fuel Pump Relay Relocation Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 12/10/1973 Make: Cessna Aircraft Company Model: 310I 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: 73-25-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-1748 AD NUMBER: 73-25-01 SUBJECT HEADING: Airworthiness Directives; CESSNA Model 310I Airplanes ACTION: SUMMARY: DATES: Effective December 10, 1973. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 73-25-01 CESSNA: Amdt. 39-1748. Applies to Model 310I (Serial Numbers 310I-0001 thru 310I-0200) airplanes. Compliance: Required as indicated, unless already accomplished. To remove possible sources of ignition in the wing leading edge area, within the next 25 hours' time in service after the effective date of this AD, accomplish the following: Relocate the heater fuel pump relay from the existing location in the wing leading edge to the inboard side of the third trailing edge wing rib assembly (wing station 47.83) outboard of the wing root rib in accordance with Cessna Service Letter ME73-5, Supplement No. 2, incorporating Cessna Service Kit SK 310-90A, or later FAA-approved revisions or any other modification approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region. This amendment becomes effective December 10, 1973. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.