Bombardier has issued SB 604-52-007 for Challenger CL-600-2B16 models to address corrosion in the "lower structural elements of the passenger door". Bombardier states that purpose of this Service Bulletin, which effects serial numbers 5301 to 5665, is to remove the epoxy ramp and repair corrosion. The epoxy ramp around the MED, which has been found to deteriorate over time, can allow for moisture to enter which can lead to corrosion damage. Additional modifications include adding draining holes to allow access to facilitate scheduled inspections. On this particular door, corrosion was identified on the MED hinge, the forward and aft lower corners, the lower center channel and hinge fairings.

The epoxy ramp was removed as per the instructions to further assess the state of the corrosion damage and begin repairs. The deterioration of this epoxy is likely the source of the trapped moisture which contributed to the spread of the corrosion. Corrosion thrives under humid environments where deterioration of metal can occur relatively quickly. One of the best ways to prevent corrosion damage is to ensure the area in question is protected from moisture as much as possible. Sealant was added in select areas to further protect the area from moisture.

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Gulfstream G280 owners with serial numbers 2001-2189 will be required to comply with Service Bulletin 280-57-277 "Cold Working of Holes in Lower Skin Stringer 3 Common to Outboard Feed Tank Lower Bracket". This Service Bulletin calls for an inspection of the stringer around the three fastener holes and the stringer at the lower outboard end of the feeder tank for cracks. If no cracks are found, cold work is to be performed on the holes.

This Service Bulletin has been issued in response to Gulfstream discovering 'the design was found to be insufficiently fatigue resistant, concentrated around three holes'. It is recommended that this task be accomplished concurrently with SB 280-57-182 "Wings - Enlarging Corner Holes on Feed Tank Bracket".

SEAL Aviation is prepared to assist our customers with Service Bulletin 280-57-277. The SEAL Aviation Structural Team has the ability to access and inspect the fastener holes listed by Gulfstream. SEAL Aviation has the specialized tooling on-hand and has decades of experience cold working fastener holes on aircraft. Additionally, our mobile capabilities allow us to come to you to perform this maintenance, anywhere in the world!

SEAL Aviation is a part 145 repair station that operates a mobile company which has the capability to provide heavy structural repairs, fuel leak repairs, and non-destructive testing for your aircraft, anywhere in the world. SEAL Aviation is an FAA, EASA, Mexico authorized repair station and SEAL Aviation NDT Techs are SNT-TC-1A, NAS410, EASA and Cessna/Citation Certified. Click the button below to visit our website and request pricing.

Greg from D.O.M. Magazine sat down with Jerel Bristol, owner of SEAL Aviation and SEAL Aero Parts for a interview on the D.O.M. Management Insight Podcast. They discuss what "S.E.A.L." stands for (Spoiler: Yes, it is an acronym!), what inspired Jerel to start SEAL Aviation and what drives him daily. Check out this unique insider view into the aviation industry at the link below!

Seal Aviation is your solution to cost effective onsite aircraft weighing. We are proud to offer our weight and balance service on almost any type and size of aircraft. SEAL has the capability to accommodate aircraft up to 150,000 lbs with jack cells and can weigh up to 30,000 lbs with platforms.  SEAL Aviation has industry leading certified technicians and we guarantee accuracy and repeatability!

SEAL Aviation has performed aircraft weighting on many different types and models of aircraft, from smaller aircraft like Cessna to larger aircraft such as the Boeing 737 MAX. SEAL Aviation can assist repair stations, avionics shops, aircraft owners, repair facilities, fixed base operators, aircraft paint shops and interior shops. We have the capability to weigh many different types of aircraft including single and twin engine, float planes, helicopters, corporate and commuter jets. Click the button below to visit our website to view our capabilities and certifications.

Once the aircraft has been weighed, SEAL Aviation provides the customer with a weight and balance report. For more information, call one of our expert technicians at (954)492-3522 or visit our website 24/7 to request a quote.

During the period between November 18 and November 21, 2017, seven airplanes with civilian
registry identified in Appendix 1 were serviced with jet fuel containing DEF at Eppley Air Field
Airport, Omaha, Nebraska (KOMA). During the same time period, an additional six airplanes
identified in Appendix 2 were serviced using refueling equipment that had been exposed to DEF.
The DEF was inadvertently used instead of fuel system icing inhibitor (FSII) on two refueling trucks
at KOMA and injected into the fuel with each truck’s FSII injection system. Only those airplanes
identified in Appendix 1 received the contaminated fuel, and only those airplanes identified in
Appendix 2 were serviced with refueling equipment that had been exposed to DEF.

DEF is a urea-based chemical that is not approved for use in jet fuel. When mixed with jet fuel,
DEF will react with certain jet fuel chemical components to form crystalline deposits in the fuel
system. These deposits will flow through the aircraft fuel system and may accumulate on filters,
fuel metering components, other fuel system components, or engine fuel nozzles. The deposits may
also settle in the fuel tanks or other areas of the aircraft fuel system where they may potentially
become dislodged over time and accumulate downstream in the fuel system as described above.
Airplanes identified in Appendix 1 have experienced clogged fuel filters and fuel nozzle deposits
that led to service difficulties and unplanned diversions. Airplanes identified in Appendix 2 were
exposed to trace amounts of DEF from residual fuel remaining in the refueling hoses and equipment
and we have not received any service difficulty reports from these aircraft.

Read more below by downloading the full PDF.