# Proposed AD 2002-NM-28-AD: Boeing Model 747 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-11-01
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 16, 2002, 67 FR 63856
- Comments due: December 2, 2002
- Became: [AD 2003-11-01](https://openairdocs.org/ad/2003-11-01)
- Docket: 2002-NM-28-AD
- FR document: 02-26203
- Official PDF: https://openairdocs.org/files/sha256/ab/f3/abf30f297745c8a5afbf3e8a93685380bc4a62411eaf6b1cf601bae8ca88b1a0 (from https://www.govinfo.gov/content/pkg/FR-2002-10-16/pdf/02-26203.pdf)
- Federal Register: https://www.federalregister.gov/documents/2002/10/16/02-26203/airworthiness-directives-boeing-model-747-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8CAD476BBCC8901B86256C540058FF6F.0001
- Page: https://openairdocs.org/proposed/2002-NM-28-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to all Boeing Model 747 series airplanes, that currently requires periodic inspections and cleaning of the drainage system cavity of the canted pressure deck, aft of the wing center section. This action would add new repetitive tests and inspections for discrepancies of the drainage system of the canted pressure deck located in the wheel wells of the main landing gear (MLG) of the left and right wings; and corrective actions, if necessary. The action would also terminate the requirements of the existing AD. The actions specified by the proposed AD are intended to prevent ice accumulation on the lateral flight control cables due to water entering the wheel well of the MLG and freezing, which could restrict or jam control cable movement, resulting in loss of controllability of the airplane.

## Notices in this docket

- Oct 16, 2002: Notice of proposed rulemaking (NPRM). (first notice), FR document 02-26203, comments due Dec 2, 2002 (https://www.federalregister.gov/documents/2002/10/16/02-26203/airworthiness-directives-boeing-model-747-series-airplanes)

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