Page 29 - Volume 12 Number 2

Technically...
From Multi-Engine Turboprop Communiqué # ME-TP-007
Date: January 2018
ATA 23 – Cockpit Voice Recorder (CVR) and Flight Data Recorder (FDR) 90-Day Underwater Locator Beacon (ULB)
In 2015, the FAA revised Technical Standard Order (TSO) C121a for ULBs. TSO C121b was released to provide standards for ULBs with a battery capable of lasting for 90 days after activation. At the same time, they implemented a restriction against any new 30-day ULBs being developed and approved under the previous version of the TSO. The longer battery life can provide critical additional time for search crews and accident investigators to find CVRs and FDRs after an accident into a body of water. As of December 1, 2015, all newly certified ULBs must have batteries that meet the 90-day performance standard.
Textron Aviation recently began installing 90-day ULBs in new production CVR and FDR installations on all King Air product lines. Fielded aircraft with L-3 Aviation Recorders CVRs and FDRs can easily upgrade to the 90-day ULBs through the L-3 service bulletin applicable to that model recorder. The bulletins provide information for kits which provide the parts required to install the 90-day ULB in place of the current 30-day ULB. This upgrade can be performed without returning the recorder to the vendor or removing it from the aircraft. The installation adds a MOD DOT to the recorder’s identification plate but does not change the part number of the recorder, so no additional aircraft manufacturer approvals are needed. To determine if your aircraft has the 90-DAY ULB, refer to your time life or equipment serialization records. Factory installed 90-day ULBs are listed as L-3 P/N 266-E5542-00. For additional information please contact your nearest authorized service center.
ATA 32 – Nose Landing Gear Strut “Leaking”
There have been reports and questions regarding leaking nose struts on the King Air series aircraft. This oil, that was seen leaking, was not red hydraulic fluid; it was motor oil, brown in color.
RECENT SERVICE BULLETINS,
ADVISORY DIRECTIVES
AND SAFETY COMMUNICATIONS
TSO High Altitude FAA Approved Mask
with comfort fit headgear
King Air Replacement Mask Carbon Fiber
Trusted experts on King Air engine accessories & de-ice systems since 1965
Call with code
BSA
10% off basic OH
1-800-835-2961
Offer valid until 5/31/18
Parts & Accessories Wichita, KS 67211 AN
COMPANY
FEBRUARY 2018 KING AIR MAGAZINE • 27
Phone (800) 237-6902 www.aerox.com