# Proposed AD FAA-2005-20135: McDonnell Douglas Model DC-8-33 and -43 Airplanes; Model DC-8F-54 and DC-8F-55 Airplanes; and Model DC-8-50, -60, -60F, -70, and -70F Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-08-08
- Products: McDonnell Douglas
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 28, 2005, 70 FR 4055
- Comments due: March 14, 2005
- Became: [AD 2005-08-08](https://openairdocs.org/ad/2005-08-08)
- Docket: FAA-2005-20135 (https://www.regulations.gov/docket/FAA-2005-20135, where comments are filed)
- Project: 2003-NM-231-AD
- FR document: 05-1588
- Official PDF: https://openairdocs.org/files/sha256/45/99/45994e892688f4c8c64b3d77cebc7375a8382e1b8fcb98c34ac549ece80e04b7 (from https://www.govinfo.gov/content/pkg/FR-2005-01-28/pdf/05-1588.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/01/28/05-1588/airworthiness-directives-mcdonnell-douglas-model-dc-8-33-and--43-airplanes-model-dc-8f-54-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6A4C60C6471CF06C86256F970054129E.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20135

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) for certain McDonnell Douglas series airplanes. That AD currently requires repetitive inspections of the electrical connectors of the explosive cartridge wiring of the engine fire extinguisher containers to verify if the identification number labels are installed and legible; repetitive electrical tests of all explosive cartridge wiring of the engine fire extinguisher containers to verify proper installation and function; and corrective actions if necessary. This proposed AD would also require an inspection of the emergency shut off wire assembly; installation of lanyards on the electrical connectors for the engine fire extinguishing agent containers and for the auxiliary power unit fire extinguishing agent containers if applicable; and related investigative/corrective actions, as applicable. This proposed AD is prompted by reports of cross-wired electrical connectors of the engine fire extinguishing agentcontainers. We are proposing this AD to detect and correct cross-wired electrical connectors of the fire extinguishing system, which could release fire extinguishing agent into the incorrect engine nacelle in the event of an engine fire.

## Notices in this docket

- Jan 28, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-1588, comments due Mar 14, 2005 (https://www.federalregister.gov/documents/2005/01/28/05-1588/airworthiness-directives-mcdonnell-douglas-model-dc-8-33-and--43-airplanes-model-dc-8f-54-and)

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