# Proposed AD FAA-2005-20662: McDonnell Douglas Model DC-10-10, DC- 10-10F, DC-10-15, DC-10-30, DC-10-30F (KC-10A and KDC-10), DC-10-40, DC-10-40F, MD-10-10F, and MD-10-30F Airplanes; and Model MD-11 and MD- 11F Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-17-04
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 22, 2005, 70 FR 14432
- Comments due: May 6, 2005
- Became: [AD 2005-17-04](https://openairdocs.org/ad/2005-17-04)
- Docket: FAA-2005-20662 (https://www.regulations.gov/docket/FAA-2005-20662, where comments are filed)
- Project: 2004-NM-191-AD
- FR document: 05-5574
- Official PDF: https://openairdocs.org/files/sha256/ce/45/ce4536fa42a9118bacd75c5a1e6c5e0fc1915e0fefab45c3d89a4fdd522d4ada (from https://www.govinfo.gov/content/pkg/FR-2005-03-22/pdf/05-5574.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/03/22/05-5574/airworthiness-directives-mcdonnell-douglas-model-dc-10-10-dc-10-10f-dc-10-15-dc-10-30-dc-10-30f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/153EF44EF7A8C77786256FCC0050866C.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20662

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain McDonnell Douglas airplanes. This proposed AD would require a general visual inspection for damage to the Firex discharge pipes and wye assembly of the number 2 engine fire extinguishing system; and corrective and other specified actions, as applicable. This proposed AD is prompted by reports of freezing damage to the Firex discharge pipes and wye assembly of the number 2 engine, and one report of a level 1 ENG FIRE AGENT LO alert during flight. We are proposing this AD to prevent accumulation of water in the discharge pipes and possible consequent freezing damage to the discharge pipes and wye assembly, which could lead to failure of the fire extinguishing system during a fire in the number 2 engine.

## Notices in this docket

- Mar 22, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-5574, comments due May 6, 2005 (https://www.federalregister.gov/documents/2005/03/22/05-5574/airworthiness-directives-mcdonnell-douglas-model-dc-10-10-dc-10-10f-dc-10-15-dc-10-30-dc-10-30f)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.