# Same as “number” ºC Centigrade degrees AIB Accident Investigation Board AOS Airport Operational Supervisor AMM Aircraft Maintenance Manual ATM Air Traffic Management ATPL Airline Transport Pilot Licence BMI British Midland CAVOC Ceiling And Visibility OK ECAM Electronic Centralized Aircraft Monitoring ENG2 Engine 2 Fig Figure FIR Flight Information Region FL350 Flight level 350 (35000 feet) FOD Foreign Object Damage GPIAA Gabinete de Prevenção e Investigação de Acidentes com Aeronaves (Portuguese Air Accident Investigation Branch) IAE International Aero Engines H Hours HCF High Cycle Fatigue HPC High Pressure Compressor IIC Investigator in Charge ICAO International Civil Aviation Organization INOP Inoperative INCID Incident NM Nautical Miles PIC Pilot In Command QNH Altitude above mean sea level based on local station pressure S/N Serial Number TSM Trouble Shooting Manual UTC Universal Time Coordinated VOR Very high frequency Omnidirectional Range VSV Variable Stator Vanes