The FAA is issuing an update of advisory circular AC 20-42D: Hand Fire Extinguishers for Use in Aircraft. It provides guidance for firefighting effectiveness, selection, location and mounting of hand fire extinguishers. The circular establishes halocarbons hydrochlorofluorocarbon (HCFC) Blend B, hydrofluorocarbon (HFC)-227ea and HFC-236fa as FAA-approved replacement agents to Halon 1211.
The National Fire Protection Association’s technical committee on airport facilities has dropped a proposed requirement for automatic sprinkler systems in Group III hangars. The revision to the NFPA 409 Standard on Aircraft Hangars is set to be submitted to the NFPA Standards Council for final approval, according to NATA, and included in the 2010 revision of NFPA 409.
The National Fire Protection Association (NFPA) says its new revised NFPA 409 standard does not require Group II hangars to be fitted with foam fire-suppression systems, as was previously thought by NATA and NBAA and reported in last week’s issue of AINmxReports.
The National Air Transportation Association (NATA) says requiring foam fire suppression systems to be installed in Group II hangars is financially “impractical and not justifiable.” Group II hangars cover more than 12,000 sq ft and their main doors are up to 28 feet high.
The manufacturer of portable halon fire extinguishers targeted for mandatory replacement said the units involved “do not represent a safety problem,” even though they are not in compliance with technical requirements. In a proposed AD, the FAA is calling for the removal of some 39,000 of the extinguishers due to improper crimping of the units’ siphon tubes.
Nearly 40,000 Kidde Aerospace halon fire extinguishers will have to be removed from service, under a proposed airworthiness directive. The FAA said the discharge time of the handheld units (part number 898052 and serial number of W-389653 or lower in units built between 1995 and 2002) exceeds the maximum allowable discharge time due to an allegedly crimped siphon tube.
A single report of a mis-wired APU fire-extinguishing bottle on a Citation X (Model 750) has prompted a proposed AD to require placing identification sleeves on the positive and negative terminals of APU and main engine fire-extinguishing bottle wiring and reconnecting the wires to the correct terminal studs on Citation 500s, 550s, S550s, 560s, 560XLs and 750s.
Kidde portable fire extinguishers that have been determined to be faulty must be replaced in some 39,000 aircraft, according to a recent AD. The manufacturer said the units involved “do not represent a safety problem,” even though they do not comply with technical requirements. The affected extinguishers (P/N 898052 with S/Ns from V-432001 to W-389653 and built between 1995 and 2002) exceed the maximum allowable discharge time of 10 seconds.
A single report of a miswired APU fire-extinguishing bottle on a Citation X (C750) has prompted a proposed AD to require placing identification sleeves on the positive and negative terminals of APU and main engine fire-extinguishing bottle wiring and reconnecting the wires to the correct terminal studs on Citation 500s, 550s, S550s, 560s, 560XLs and 750s.
Halon fire-extinguishing agents have been used for many years to protect valuable electronics, oil and gas production facilities, military systems, aircraft and other critical operations. The Army Corps of Engineers developed Halon (short for halogenated hydrocarbons) in 1948 as a less toxic but highly effective alternative to methyl bromide.
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