Certification Service Washington, DC U.S. Department of Transportation Federal Aviation Administration
March 1, 2012
This is information only. Recommendations
This Special Airworthiness Information Bulletin (SAIB) alerts you,
owners/operators of Cessna Aircraft Company Models 500, 501 and 550
Airplanes with an installed auxiliary fuel tank following Sierra
Industries, Ltd. Supplemental Type Certificates (STC) SA80RM or
SA152RM, of new instructions for continued airworthiness (ICA).
At this time, the Federal Aviation Administration (FAA) has determined
this airworthiness concern is not an unsafe condition that would
warrant airworthiness directive (AD) action under Title 14 of the Code
of Federal Regulations (14 CFR) part 39.
This SAIB is a result of a Cessna Aircraft Company Model 501 airplane
that developed fuel leaks in the auxiliary fuel tank installed with
Sierra Industries, Ltd. STC. Investigation revealed improper
maintenance was performed in an attempt to reseal the fuel tank. The
ICA introductory paragraph states the Citation maintenance manual
structural repairs and tank sealing instructions apply to tank repair
However, the FAA and Sierra Industries saw this as an opportunity to
revise the ICA and raise awareness of the ICA. In response, Sierra
Industries, Ltd. created revised ICA, Document MMS-911, Issue 1, dated
November 28, 2011, to expand and clarify inspection requirements and
maintenance instructions for the auxiliary fuel tank and fuel system.
The new ICA includes maintenance and repair instructions, operational
check and trouble shooting procedures, a fuel system schematic and
wiring diagram, and major parts list.
The FAA recommends all owners and operators of Cessna Aircraft Company
Models 500, 501, and 550 airplanes modified with Sierra Industries,
Ltd. STC SA80RM or SA152RM obtain a copy of and comply with the
inspection and maintenance requirements contained in Sierra Industries,
Ltd. ICA Document MMS-911, Issue 1, dated November 28, 2011.
For Further Information Contact
Andrew McAnaul, Aerospace Engineer, FAA/ASW-150, c/o SAT-MIDO-43, 10100
Reunion Place, Suite 650, San Antonio, TX 78216; phone: (210) 308-3365;
fax: (210) 308-3370; e-mail: Andrew.McAnaul@faa.gov.
For Related Service Information Contact
Sierra Industries, Ltd, 122 Howard Langford Drive, Uvalde, TX 78801;
phone: (830) 278-4481; fax: (830) 278-7649; website: www.sijet.com.