# Proposed AD 95-NM-29-AD: Fokker Model F28 Mark 0070 and 0100 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 97-24-16
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: February 3, 1997, 62 FR 4944
- Comments due: February 24, 1997
- Became: [AD 97-24-16](https://openairdocs.org/ad/97-24-16)
- Docket: 95-NM-29-AD
- FR document: 97-2520
- Official PDF: https://openairdocs.org/files/sha256/e7/7f/e77f621aff221e38bba6610048b693d4c62fd3337ea75ba613e940b304959b85 (from https://www.govinfo.gov/content/pkg/FR-1997-02-03/pdf/97-2520.pdf)
- Federal Register: https://www.federalregister.gov/documents/1997/02/03/97-2520/airworthiness-directives-fokker-model-f28-mark-0070-and-0100-series-airplanes
- Page: https://openairdocs.org/proposed/95-NM-29-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0070 and 0100 series airplanes, that would have required a one-time operational test of the pitot heating system, and repair or replacement of failed elements. That action also proposed to require the replacement of the pitot heating system with a new improved system. This new action would revise the proposal by adding a requirement to install power supply wiring with increased gauge thickness and a circuit breaker with an increased amperage rating. This action also would add additional airplanes to the applicability of the rule. The actions specified by this proposed AD are intended to prevent icing of the No. 1 pitot tube, which could result in failure of the No. 1 Air Data Computer, or output of erroneous airspeed data to all on-side subsidiary systems, including the Automatic Flight Control and Augmentation System.

## Notices in this docket

- Apr 18, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-9470, comments due May 30, 1995 (https://www.federalregister.gov/documents/1995/04/18/95-9470/airworthiness-directives-fokker-model-f28-mark-0100-series-airplanes)
- Feb 12, 1996: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 96-2997, comments due Mar 4, 1996 (https://www.federalregister.gov/documents/1996/02/12/96-2997/airworthiness-directives-fokker-model-f28-mark-0100-and-0070-series-airplanes)
- Feb 3, 1997: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 97-2520, comments due Feb 24, 1997 (https://www.federalregister.gov/documents/1997/02/03/97-2520/airworthiness-directives-fokker-model-f28-mark-0070-and-0100-series-airplanes)

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