# AD 70-15-12: Engine Drain Line

- Type: Airworthiness directive
- Status: Current
- Products: Short Brothers SC-7 Skyvan Series 3
- Effective: July 23, 1970
- Superseded by: Nothing supersedes this AD
- Product type: Aircraft, Small airplane
- Amendment: 39-1043
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9220E03759E4950C86256A550066607A.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/70-15-12

## The airworthiness directive

70-15-12 SHORT BROTHERS AND HARLAND, LIMITED: Amdt. 39-1043. Applies to Model SC-7, Series III airplanes.

To prevent cracking around the drain boss of the engine plenum chamber, within the next 25 hours' time in service after the effective date of this AD, unless already accomplished, incorporate Modification No. 1034 by installing flexible drain lines between the engine plenum chamber and bottom heat shield on both engines in accordance with Shorts Bulletin No. 71-56, Revision 1, dated May 20, 1970, or a later ARB-approved issue or an FAA approved equivalent.

This amendment becomes effective July 23, 1970.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS A15EU](https://openairdocs.org/tcds/A15EU): De Havilland Aircraft of Canada Limited; names 1 of 2 models: SC-7 Skyvan Series 3

## 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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