# Proposed AD 2002-NE-01-AD: Hamilton Sundstrand Power Systems (Formerly Sundstrand Power Systems, Turbomach, and Solar) T-62T Series Auxiliary Power Units

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-15-02
- Products: Hamilton Sundstrand Power Systems
- Product type: Appliance
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 28, 2002, 67 FR 14889
- Comments due: May 28, 2002
- Became: [AD 2002-15-02](https://openairdocs.org/ad/2002-15-02)
- Docket: 2002-NE-01-AD
- FR document: 02-7416
- Official PDF: https://openairdocs.org/files/sha256/6a/48/6a48fd7516fe4abf67270db2eaba061cc43ee2c68b1ba775464f76f1840c8714 (from https://www.govinfo.gov/content/pkg/FR-2002-03-28/pdf/02-7416.pdf)
- Federal Register: https://www.federalregister.gov/documents/2002/03/28/02-7416/airworthiness-directives-hamilton-sundstrand-power-systems-formerly-sundstrand-power-systems
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4827169C4E7081DA86256B8A005CAE96.0001
- Page: https://openairdocs.org/proposed/2002-NE-01-AD

## Summary

The Federal Aviation Administration (FAA) proposes to adopt a new airworthiness directive (AD) that is applicable to Hamilton Sundstrand Power Systems (formerly Sundstrand Power Systems, Turbomach, and Solar) T-62T series auxiliary power units (APU's) with compressor wheel part number (P/N) 100636-1 installed. This proposal would require the replacement of compressor wheels P/N 100636-1. This proposal is prompted by a manufacturer's stress analysis that indicates stress levels high enough to initiate and drive crack growth in these compressor wheels. The actions specified by the proposed AD are intended to mandate the replacement of the affected compressor wheels, which if not replaced, could result in uncontained compressor wheel failure and damage to the airplane.

## Notices in this docket

- Mar 28, 2002: Notice of proposed rulemaking (NPRM). (first notice), FR document 02-7416, comments due May 28, 2002 (https://www.federalregister.gov/documents/2002/03/28/02-7416/airworthiness-directives-hamilton-sundstrand-power-systems-formerly-sundstrand-power-systems)

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