# AD 80-02-07: Pressure Refuel/Defuel System

- Type: Airworthiness directive
- Status: Current
- Products: Textron HS.125 Series 700A and HS.125 Series 700B
- Effective: January 24, 1980
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Large airplane
- Amendment: 39-3657
- Registered aircraft: 22 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3BBDD3511B057D5E862569F200712DE4.0001
- DRS record last changed: January 21, 2026
- Page: https://openairdocs.org/ad/80-02-07

## The airworthiness directive

80-02-07 BRITISH AEROSPACE: Amendment 39-3657. Applies to British Aerospace Model HS 125 Series 700 airplanes with pressure refuel/defuel system installed, certificated in any category.

Compliance is required as indicated unless already accomplished.

To prevent the failure of the aluminum HTE "V" clamps installed in the pressure refuel and defuel system, within the next 50 hours time in service or within the next 28 days after the effective date of this AD, whichever occurs sooner, incorporate British Aerospace modification 252694, or an equivalent modification approved by the Chief, Aircraft Certification Staff, AEU- 100, Europe, Africa, and Middle East Region, Federal Aviation Administration, c/o American Embassy, Brussels, Belgium.

NOTE: British Aerospace Service Bulletin 28-67 revision 1 dated December 19, 1978 and Service Bulletin 28-A66 dated October 3, 1978 refer to this same subject.

This amendment becomes effective January 24, 1980.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A3EU](https://openairdocs.org/tcds/A3EU): Textron Aviation Inc.; names 2 of 50 models: HS.125 Series 700A, HS.125 Series 700B

## 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: 22 (22 by airframe model, 0 by engine model)
- Makers: British Aerospace 14, Hawker Siddeley 7, Raytheon 1

Models with the most aircraft:

- [British Aerospace HS 125-700A](https://openairdocs.org/model/british-aerospace-hs-125-700a): 14 aircraft (airframe model)
- [Hawker Siddeley HS.125 SERIES 700A](https://openairdocs.org/model/hawker-siddeley-hs-125-series-700a): 7 aircraft (airframe model)
- [Raytheon HS 125-700A](https://openairdocs.org/model/raytheon-hs-125-700a): 1 aircraft (airframe model)

All 3 models: https://openairdocs.org/ad/80-02-07/models.md
Every aircraft: https://openairdocs.org/ad/80-02-07/aircraft.md

Its text cites no advisory circulars or STCs.

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