# Proposed AD 90-CE-67-AD: Jetstream Aircraft Limited (Formerly British Aerospace, Regional Aircraft Limited) Jetstream Models 3101 and 3201 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 95-11-17
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of the comment period.
- Published: February 10, 1995, 60 FR 7922
- Comments due: April 14, 1995
- Became: [AD 95-11-17](https://openairdocs.org/ad/95-11-17)
- Docket: 90-CE-67-AD
- FR document: 95-3361
- Official PDF: https://openairdocs.org/files/sha256/ef/94/ef944b972077721bfa694b757aff1103cdf101aef6b9ca40e04e993f16bc726d (from https://www.govinfo.gov/content/pkg/FR-1995-02-10/pdf/95-3361.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/02/10/95-3361/airworthiness-directives-jetstream-aircraft-limited-formerly-british-aerospace-regional-aircraft
- Page: https://openairdocs.org/proposed/90-CE-67-AD

## Summary

This document reopens the comment period for an earlier proposed airworthiness directive (AD) that proposed to supersede AD 90- 13-12, which currently requires modifying the airplane electrical system and revising the emergency procedures section of the Airplane Flight Manual (AFM) on certain Jetstream Aircraft Limited (JAL) Jetstream Models 3101 and 3201 airplanes. The proposal would have retained the requirements of that AD for those airplanes that have not installed modified inverters and restored the inverted transfer function. Since publication of that proposal, the Federal Aviation Administration (FAA) has re-examined various service difficulty reports on the affected airplanes, and determined that the proposed modification is still a valid safety issue (but not an urgent safety of flight issue). Since sufficient time has passed (more than 12 months) since the issuance of the original proposal, the FAA is allowing additional time for the public to comment. The proposed actions are intended to prevent alternating current system failures, which, if not detected and corrected, could result in damage to the airplane navigational systems.

## Notices in this docket

- Feb 10, 1995: Supplemental notice of proposed rulemaking (NPRM); reopening of the comment period. (first notice), FR document 95-3361, comments due Apr 14, 1995 (https://www.federalregister.gov/documents/1995/02/10/95-3361/airworthiness-directives-jetstream-aircraft-limited-formerly-british-aerospace-regional-aircraft)

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