# AD 46-14-02: Cockpit Heat Control Valve

- Type: Airworthiness directive
- Status: Current
- Products: Fairchild Hiller M-62A-3 and M-62A-4
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Registered aircraft: 67 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/157206764C07C6AB86256A38004EAFA0.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/46-14-02

## The airworthiness directive

46-14-02 FAIRCHILD: (Was Mandatory Note 4 of AD-724-2.) Applies to Models M- 62A3 and M-62A4 Aircraft.

Compliance required immediately.

The aluminum alloy cockpit heat control valve box and valve must be replaced with a valve and box made of ferrous metal at least 0.018-inch thick. If ordinary steel is used, it should be suitably protected against corrosion. In lieu of the foregoing it will be satisfactory to remove the valve box to seal the opening in the firewall with an overlapping sheet of ferrous metal secured with the present bolts and nuts.

(Fairchild Service Bulletin No. 45-62-10 dated July 9, 1945, covers this same subject.)

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A-724](https://openairdocs.org/tcds/A-724): Fairchild Hiller Corporation; names 2 of 5 models: M-62A-4, M-62A-3

## 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: 67 (67 by airframe model, 0 by engine model)
- Makers: Fairchild 67

Models with the most aircraft:

- [Fairchild M-62A-3](https://openairdocs.org/model/fairchild-m-62a-3): 56 aircraft (airframe model)
- [Fairchild M-62A-4](https://openairdocs.org/model/fairchild-m-62a-4): 10 aircraft (airframe model)
- [Fairchild PT-26 M62A3](https://openairdocs.org/model/fairchild-pt-26-m62a3): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/46-14-02/models.md
Every aircraft: https://openairdocs.org/ad/46-14-02/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.