FAA Aviation Mechanic - Airframe (AMA) case studies
FAA Aviation Mechanic - Airframe (AMA) · Put your knowledge to work in context.
The Airframe rating is one of the two ratings that make up the FAA's Airframe and Powerplant (A&P) mechanic certificate, and it is the one that certifies a technician to maintain, repair, and inspect aircraft structure and the systems bolted to it - sheet metal and composite repairs, fabric and dope, welding, hydraulics and pneumatics, electrical and fuel systems, landing gear, ice and rain protection, fire detection and extinguishing, cabin environmental systems, instruments, communications and navigation equipment, and the assembly, rigging, and inspection work that ties all of it together. Candidates typically reach the knowledge test through an FAA-approved Part 147 maintenance training program or through documented practical experience, and the Airframe written test is normally taken alongside the General test before scheduling the oral and practical portion with a Designated Mechanic Examiner. The FAA Aviation Mechanic - Airframe (AMA) case studies are 5 cases and about 2,066 words.
1Wing Spar Web Corrosion at a Fastener Row
During a C-check on an 18-year-old Part 25 twin-engine airplane with 22,000 flight cycles, eddy-current inspection finds corrosion on the lower wing spar web. Nominal web thickness is 0.250 in.
423 words, about 2 min2Hydraulic Pressure Fluctuation and High Case Drain
On a 3,000-psi hydraulic system with an engine-driven pump and a 28-V electric standby pump, the crew reports pressure fluctuating between 2,600 and 3,000 psi and slow landing-gear retraction. When the electric standby pump is selected ON, it runs continuously.
420 words, about 2 min3Aft Pressure Bulkhead Corrosion at Annual Inspection
During an annual inspection of a 1978 pressurized twin used under Part 91, you find white powdery corrosion around a stringer attachment on the aft pressure bulkhead. Eddy-current inspection indicates about 0.020 in of material loss.
410 words, about 2 min4Alternator-Out and Open Field Circuit
After takeoff in a 28-V DC twin, the left alternator-out light illuminates and the bus-tie relay opens. Battery voltage is 24.5 V and falling; the battery ammeter shows 25 A discharge.
395 words, about 2 min5Composite Flap Delamination Near the Hinge Line
During a flap inspection on a composite-skin airplane, you find a 1.5 in by 0.8 in delamination in the upper flap skin near the trailing edge. There is no through-penetration and no visible lightning-strike damage.
418 words, about 2 min