# Proposed AD 95-NM-28-AD: Boeing Model 737 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 95-23-10
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 2, 1995, 60 FR 28763
- Comments due: July 31, 1995
- Became: [AD 95-23-10](https://openairdocs.org/ad/95-23-10)
- Docket: 95-NM-28-AD
- FR document: 95-13503
- Official PDF: https://openairdocs.org/files/sha256/59/a7/59a7157d1def2d6df56c0eae6fb2fc7dea34a9e5c7ea66d1d81b0493532ff4a7 (from https://www.govinfo.gov/content/pkg/FR-1995-06-02/pdf/95-13503.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/06/02/95-13503/airworthiness-directives-boeing-model-737-series-airplanes
- Page: https://openairdocs.org/proposed/95-NM-28-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Boeing Model 737 series airplanes. This proposal would require revising the FAA-approved Airplane Flight Manual (AFM) to provide the flightcrew with additional procedures for shutting down the auxiliary power unit (APU) when an APU fire is indicated. This proposal is prompted by reports indicating that a latent electrical failure exists in the fire extinguishing system for the APU; this failure could prevent the APU from shutting down and fire extinguishant from discharging into the APU compartment in the event of an APU fire. The actions specified by the proposed AD are intended to ensure that the flightcrew is provided with procedures for shutting down the APU in the event of an APU fire.

## Notices in this docket

- Jun 2, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-13503, comments due Jul 31, 1995 (https://www.federalregister.gov/documents/1995/06/02/95-13503/airworthiness-directives-boeing-model-737-series-airplanes)

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