Super King Air 350
Maintenance Airframe; Maintenance Powerplant
Maintenance Lead Technician 43
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action; General Flight Cancelled / Delayed
Aircraft
The spar bumper; in the main wheel well; on the left side of Aircraft X fell off while the aircraft was in the hangar. The aircraft was delivered from the factory 2 years ago and this part was installed incorrectly. Textron considers this a grounding discrepancy because of the chance that the landing gear could hit the main spar in the event of a gear up landing. Other aircraft need to be looked at for proper factory installation.
Reporter stated this 2-year-old King Air 350 was not in maintenance at the time of the incident; it was sitting in the hangar when a technician heard the thump as the spar bumper hit the ground.  Aircraft has about 2300 hrs and 1250 cycles on the airframe in military service.  Reporter suspects improper adhesive was possibly used during manufacturing process.
Lead Technician reported a spar bumper fell out of the main wheel well while the aircraft was in the hangar.