# Proposed AD 2000-NM-212-AD: Raytheon Model BAe.125 Series 800A (C-29A and U-125 Military), 1000A, and 1000B Airplanes; Hawker 800 (U-125A Military) Airplanes; and Hawker 800XP and 1000 Series Airplanes.

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-13-05
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: February 14, 2001, 66 FR 10236
- Comments due: March 12, 2001
- Became: [AD 2001-13-05](https://openairdocs.org/ad/2001-13-05)
- Docket: 2000-NM-212-AD
- FR document: 01-3675
- Official PDF: https://openairdocs.org/files/sha256/7b/86/7b86aafee30e93102866b085dcbd1f032989ed4a7ef6fc6f7f98ce601f1b6e83 (from https://www.govinfo.gov/content/pkg/FR-2001-02-14/pdf/01-3675.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/02/14/01-3675/airworthiness-directives-raytheon-model-bae125-series-800a-c-29a-and-u-125-military-1000a-and-1000b
- Page: https://openairdocs.org/proposed/2000-NM-212-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain Raytheon Model BAe.125, Hawker 800 (U-125A military) and Hawker 800XP series airplanes that would have required removal of existing clamps, bedding tapes, and rubber connecting sleeves at the ends of the turbine air discharge duct and the water separator, and replacement of the clamps and rubber connecting sleeves with new, improved components. This new action revises the proposed rule by adding airplanes to the applicability; and, for certain airplanes, adding a new requirement to remove aluminum bedding strips that are installed under the existing clamps. The actions specified by this new proposed AD are intended to prevent the turbine air discharge duct or water separator outlet duct from disconnecting from the cold air unit turbine or from the water separator, resulting in the loss of air supply to maintain adequate cabin pressure. Loss of adequate cabin pressure at high altitude would require emergency procedures, such as use of oxygen, auxiliary pressurization, or emergency descent.

## Notices in this docket

- Aug 14, 2000: Notice of proposed rulemaking (NPRM). (first notice), FR document 00-20507, comments due Sep 28, 2000 (https://www.federalregister.gov/documents/2000/08/14/00-20507/airworthiness-directives-raytheon-model-bae125-hawker-800-u-125a-and-hawker-800xp-series-airplanes)
- Feb 14, 2001: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 01-3675, comments due Mar 12, 2001 (https://www.federalregister.gov/documents/2001/02/14/01-3675/airworthiness-directives-raytheon-model-bae125-series-800a-c-29a-and-u-125-military-1000a-and-1000b)

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