# Proposed AD FAA-2005-20917: Boeing Model 747-100, -200B, -200F, - 200C, -100B, -300, -100B SUD, -400, -400D, and -400F Series Airplanes; and Model 747SR Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-20-18
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 13, 2005, 70 FR 19345
- Comments due: May 31, 2005
- Became: [AD 2005-20-18](https://openairdocs.org/ad/2005-20-18)
- Docket: FAA-2005-20917 (https://www.regulations.gov/docket/FAA-2005-20917, where comments are filed)
- Project: 2004-NM-85-AD
- FR document: 05-7380
- Official PDF: https://openairdocs.org/files/sha256/fc/e1/fce1f04ef911aab8aaeb6188facacd7399fe4a57c8a1ba4134f1d4166d15f40e (from https://www.govinfo.gov/content/pkg/FR-2005-04-13/pdf/05-7380.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/04/13/05-7380/airworthiness-directives-boeing-model-747-100--200b--200f--200c--100b--300--100b-sud--400--400d-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CC6A2323765ED7BE86256FE2006E2BC8.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20917

## Summary

The FAA proposes to supersede two existing airworthiness directives (AD) for certain Boeing transport category airplanes. One AD currently requires doing certain inspections to detect cracks and corrosion around the lower bearing of the actuator attach fittings of the inboard and outboard flaps; repairing if necessary; and either overhauling the fittings or replacing them, which when done on certain actuator attach fittings ends the repetitive inspections. The other AD currently requires certain other inspections to detect discrepancies of the fittings of the flaps, and follow-on and corrective actions if necessary, which ends the repetitive inspections of the first AD. For certain airplanes, this proposed AD would require new inspections for discrepancies of the attach fittings of the flaps, and follow-on and corrective actions if necessary, which ends the repetitive inspections of both existing ADs. For all airplanes, this proposed AD would require repetitive overhaul/replacements of the fittings of both the inboard and outboard flaps. This proposed AD is prompted by reports of cracks of the attach fittings of the trailing edge flaps. We are proposing this AD to prevent cracking and other damage of the actuator attach fittings of the trailing edge flaps, which could result in abnormal operation or retraction of a trailing edge flap, and possible loss of controllability of the airplane.

## Notices in this docket

- Apr 13, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-7380, comments due May 31, 2005 (https://www.federalregister.gov/documents/2005/04/13/05-7380/airworthiness-directives-boeing-model-747-100--200b--200f--200c--100b--300--100b-sud--400--400d-and)

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