# AD 73-25-01: Heater Fuel Pump Relay Relocation

- Type: Airworthiness directive
- Status: Current
- Products: Cessna 310I
- Effective: December 10, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1748
- Registered aircraft: 60 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FC8F26C8C0CC2EAC86256A34006469E9.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-25-01

## The airworthiness directive

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.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS 3A10](https://openairdocs.org/tcds/3A10): Textron Aviation Inc.; names 1 of 23 models: 310I

## 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: 60 (60 by airframe model, 0 by engine model)
- Makers: Cessna 60

Models with the most aircraft:

- [Cessna 310I](https://openairdocs.org/model/cessna-310i): 60 aircraft (airframe model)

All 1 models: https://openairdocs.org/ad/73-25-01/models.md
Every aircraft: https://openairdocs.org/ad/73-25-01/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.