# Proposed AD FAA-2005-21138: Boeing Model 737-100, -200, and -200C Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-20-16
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 9, 2005, 70 FR 24335
- Comments due: June 23, 2005
- Became: [AD 2005-20-16](https://openairdocs.org/ad/2005-20-16)
- Docket: FAA-2005-21138 (https://www.regulations.gov/docket/FAA-2005-21138, where comments are filed)
- Project: 2004-NM-131-AD
- FR document: 05-9187
- Official PDF: https://openairdocs.org/files/sha256/83/f1/83f176725f4d3fdf5cb26a5ff1fd66b5c5eb86d521a6105cf258bf653ef8ca59 (from https://www.govinfo.gov/content/pkg/FR-2005-05-09/pdf/05-9187.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/05/09/05-9187/airworthiness-directives-boeing-model-737-100--200-and--200c-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D118E0AAEE0E6C2B86256FFC006361B2.0001
- Page: https://openairdocs.org/proposed/FAA-2005-21138

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 737-100, -200, and -200C series airplanes. This proposed AD would require a one-time detailed inspection for cracking of the lugs of the inboard attach fittings of the wing leading edge slat tracks at slat numbers 2 and 5; prior or concurrent actions for certain airplanes; repetitive high-frequency eddy current (HFEC) inspections for cracking of the lug surfaces of those inboard attach fittings if necessary; and replacement of the attach fittings with new, improved fittings. This proposed AD is prompted by reports of damage to the lugs of certain inboard attach fittings of the leading edge slat tracks. We are proposing this AD to prevent a lifted slat, which, if the airplane performs any non-normal maneuver during takeoff or landing at very high angles of attack, could lead to the loss of the slat and reduced control of the airplane.

## Notices in this docket

- May 9, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-9187, comments due Jun 23, 2005 (https://www.federalregister.gov/documents/2005/05/09/05-9187/airworthiness-directives-boeing-model-737-100--200-and--200c-series-airplanes)

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