# Proposed AD 99-NM-176-AD: Raytheon Model BAe.125 Series 1000A and 1000B, and Model Hawker 1000 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 99-25-01
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 15, 1999, 64 FR 50018
- Comments due: November 1, 1999
- Became: [AD 99-25-01](https://openairdocs.org/ad/99-25-01)
- Docket: 99-NM-176-AD
- FR document: 99-23996
- Official PDF: https://openairdocs.org/files/sha256/b7/5d/b75d7c5d30650b34bee3b11d2533e198413fc4e63822bd3309332b960fae2eec (from https://www.govinfo.gov/content/pkg/FR-1999-09-15/pdf/99-23996.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/09/15/99-23996/airworthiness-directives-raytheon-model-bae125-series-1000a-and-1000b-and-model-hawker-1000-series
- Page: https://openairdocs.org/proposed/99-NM-176-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all Raytheon Model BAe.125 Series 1000A and 1000B, and Model Hawker 1000 series airplanes. This proposal would require inspection of P1 pitot pipes for chafing or damage, and various follow-on actions. This proposal is prompted by reports of P1 pitot pipes chafing against adjacent flight control cables. The actions specified by the proposed AD are intended to prevent a hole in the P1 pitot pipes, which would lead to erroneous input to the instrumentation and warning systems associated with the pilot's instruments.

## Notices in this docket

- Sep 15, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-23996, comments due Nov 1, 1999 (https://www.federalregister.gov/documents/1999/09/15/99-23996/airworthiness-directives-raytheon-model-bae125-series-1000a-and-1000b-and-model-hawker-1000-series)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.