# Proposed AD FAA-2008-0585: Boeing Model 747SP Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2008-22-09
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 23, 2008, 73 FR 30007
- Comments due: July 7, 2008
- Became: [AD 2008-22-09](https://openairdocs.org/ad/2008-22-09)
- Docket: FAA-2008-0585 (https://www.regulations.gov/docket/FAA-2008-0585, where comments are filed)
- Project: 2008-NM-027-AD
- FR document: E8-11567
- Official PDF: https://openairdocs.org/files/sha256/0d/44/0d44e34a07d1e73305d5575df9c474342de0908d81aafa938da324a7b9482b84 (from https://www.govinfo.gov/content/pkg/FR-2008-05-23/pdf/E8-11567.pdf)
- Federal Register: https://www.federalregister.gov/documents/2008/05/23/E8-11567/airworthiness-directives-boeing-model-747sp-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C69733889699EBB086257452004A19F4.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0585

## Summary

We propose to adopt a new airworthiness directive (AD) for all Boeing Model 747SP series airplanes. This proposed AD would require repetitive lubrication of the rudder tab hinges and repetitive replacement of the rudder tab control rods. This proposed AD results from reports of freeplay-induced vibration of the control surfaces on Boeing Model 727, 737, 757, and 767 airplanes. We are proposing this AD to prevent damage to the control surface structure during flight, which could result in loss of control of the airplane.

## Notices in this docket

- May 23, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-11567, comments due Jul 7, 2008 (https://www.federalregister.gov/documents/2008/05/23/E8-11567/airworthiness-directives-boeing-model-747sp-series-airplanes)

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