Center Wing Replacement Project Paul Willing Vice President, Maintenance Lynden Air Cargo, LLC

Center Wing Replacement Project
Paul Willing
Vice President, Maintenance
Lynden Air Cargo, LLC
[email protected]
907-249-0246
Background
• June 17, 2002
– N130HP
– Hawkins & Powers
C-130A fire bomber
crashes due wing
failure
– 3 fatalities
Background
• NTSB Accident Report:
– PROBABLE CAUSE: "The inflight failure of the
right wing due to fatigue cracking in the center wing
lower skin and
underlying structural members. A factor contributing
to the accident was inadequate maintenance
procedures to detect fatigue cracking.“
• FAA issues AD 2002-19-14 on Sep 26, 2002
– Mandating wing inspections on all C-130A aircraft.
Lockheed
• C-130B/H and L-382 Center Wing actions:
– Prior to June 2002 Lockheed was supporting USAF
with Center Wing fatigue cracking issues.
– 2002 HOC presentation: Center Wing Durability
Issues the first in a series of Center Wing
presentations continuing through 2007 HOC.
– 2004 Lockheed begins major analysis effort for
Center Wing life.
– 2006 Lockheed completes the Center Wing service
life analysis.
Lockheed
• 2005 Lockheed issues two Service Bulletins for
L-382 aircraft:
– SB 382-57-84 - Operational Usage Evaluation
– SB 382-57-85 - Center Wing Lower Surface
Generalized Cracking and Widespread Fatigue
Damage Inspection Requirements
BL 61 Cracking
Related FAA Actions
• Apr 18, 2006 - Notice of Proposed Rulemaking
(NPRM) issued for Aging Aircraft Program –
Widespread Fatigue Damage (WFD)
• Nov 10, 2010 - Final Rule issued for Aging
Aircraft Program – WFD / Limit of Validity.
• May 18, 2011 – AD 2011-09-04 issued,
mandating accomplishment of SB 382-57-85.
• Jun 14, 2013 – Limit of Validity (LOV) limits in
effect – 75K hours or 58.8K cycles.
– Center Wing Life Limit AD to support LOV due ???
LAC Actions
• Accomplished SB 382-57-85 as aircraft cycled
through C Checks.
• Based on risk evaluation from the Widespread
Fatigue Damage (WFD) proposed rule, now the
LOV final rule – issued Nov 15, 2010 - and
proposed Center Wing life limits, 3 each
replacement Center Wings are required to support
a five aircraft fleet for LAC L-382G operations
beyond Q213.
LAC Actions
• Decision – to procure and replace Center Wings
on N401LC, N403LC and N406LC.
• Began discussions with Lockheed in 2007.
• Contract signed Sep 10, 2008.
• Center Wing No. 1 delivered Dec 16, 2010.
– Flown to Singapore onboard LAC Herc.
– N403LC check input STAE on Sep 11, 2011.
– Center Wing installation complete Jan 7, 2012 (118
day span) including C10 check and full paint.
1st L-382 Center Wing Replacement
One done, two to go
by STA Engineering and Lynden Air Cargo
7 January 2012
One done, two to go
The End
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