# TCDS H1AL: Risley Lester W.

- Type: Type certificate data sheet
- Status: Current
- Holder: Risley Lester W.
- Revision: 1
- Revised: September 12, 1974
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheet PDF: https://openairdocs.org/files/sha256/b3/04/b3047ccdfd47a1e248d4ad7c86c66c2ab3cd8c109d5c19f171931746f9baea88
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/030F8AC18B7868448525671500537452.0001
- Page: https://openairdocs.org/tcds/H1AL

## Models (1)

As the data sheet lists them.

- H-21B

## ADs

None name its models.

## STCs approved under this data sheet (4)

- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the
Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SR02394AK](https://openairdocs.org/stc/SR02394AK): Replacement of existing landing and/or hover light bulbs with Light Emitting Diode (LED) lighting system. Seaplanes North LLC
- [STC SA4302NM](https://openairdocs.org/stc/SA4302NM): Installation of Electronics Int'l digital automatic engine analyzer.. Electronics International
- [STC SH3319NM (1 OF 2)](https://openairdocs.org/stc/SH3319NM%20(1%20OF%202)) (historical): Installation of Precise Flight Pulselite Control Unit in the
Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc

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