# STC SP11WP

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Propeller Service
- Description: Installation of greaseless counterweight bearings. (12D 40-211, -217)
- Status date: November 20, 1981
- Data sheets: P-257
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A42E058E3C3E80185256CC2006223F8.0001
- Page: https://openairdocs.org/stc/SP11WP

## ADs that name it

None.

## Approved models (1)

- Hamilton Standard Division 12D (TCDS P-257)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.