# AD 73-12-10: Dc Power Control Box

- Type: Airworthiness directive
- Status: Current
- Products: British Aerospace Regional H.P. 137 Jetstream Mk. 1
- Effective: July 6, 1973
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small/large airplane
- Amendment: 39-1660
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FF50F57D6BA01ADA862569A4006CC993.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/73-12-10

## The airworthiness directive

73-12-10 HANDLEY PAGE (JETSTREAM AIRCRAFT LTD): Amdt. 39-1660. Applies to Model HP-137 Mk 1 airplanes.

Compliance is required within the next 50 hours' time in service after the effective date of this AD unless already accomplished.

To prevent the possible unnecessary interruption of current flow to the battery bus and non-essential bus, replace the 30 amp fuse, F10 in the D.C. power control box with a 25 amp Klixon circuit breaker, P/N D6761- 1-25, in accordance with Jetstream Aircraft Limited Modification No. 5006, Parts 1 and 2, dated September 1971, or an FAA-approved equivalent.

This amendment becomes effective July 6, 1973.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A21EU](https://openairdocs.org/tcds/A21EU): British Aerospace Regional Aircraft; names 1 of 3 models: H.P. 137 Jetstream Mk. 1

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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