North Dallas Aviation, Inc.

Sanction: 13200 · case closed 2012-01-06

Part: OIL SYSTEM — FLUCTUATES (RT ENGINE)

DURING DESCENT INTO MMSL CREW NOTICED OIL PRESSURE FLUCTUATING AND DROPPED TO 50 PSI AS A PRECAUTION CREW SHUTDOWN RH ENGINE, NO EMERGENCY DECLARED, AIRCRAFT LANDED WITHOUT INCIDENT. WAITING ON MX TO SHOW UP AND TROUBLESHOOT OIL PRESSURE ISSUE.

Part: CABIN PRESSURE — FAULTED · airframe 4,776 hrs · 3,975 cycles

AIRCRAFT LOST PRESSURIZATION AT FL450, AIRCRAFT DID EMEREGENCY DESCENT INTO KAQB, AIRCRAFT LANDING WITHOUT INCIDENT,

Part: CABIN PRESSURE — FAULTED · airframe 4,760 hrs · 4,033 cycles

AIRCRAFT DEPARTED KADS ENROUTE TO KIAH, AT FL 250 PILOT NOTICED AIRCRAFT WAS HAVING PRESSURIZATION ISSUES, PILOT RETURNED BACK TO KADS, DECLARED AND EMERGENCY BUT CANCELED, AIRCRAFT LANDED WITHOUT INCIDENT. AIRCRAFT CURRENTLY IN MAINTENANCE.

Part: NOT REPORTED — NOT REPORTED · airframe 4,735 hrs · 4,015 cycles

DURING LANDING AIRCRAFT WAS ABOUT 50 FEET ABOVE THE GROUND JUST CROSSING RUNWAY THRESHOLD #2 ENGINE SHUTDOWN, AIRCRAFT LANDED WITHOUT INCIDENT, EMERGENCY WAS NOT DECLARED. WAITING ON TEXTRON AOG MAINTENANCE.

Part: NOT REPORTED — NOT REPORTED · airframe 4,726 hrs · 4,011 cycles

ON APPROACH INTO KABQ AT 7500 FT LH ENGINE SHUTDOWN WITH POWER SETTING AT 70% N1, PILOT DECLARED EMERGENCY, AIRCRAFT LANDED WITHOUT INCIDENT. WAITING ON TEXTRON AOG TEAM TO ARRIVE TO PERFORM INSPECTION.

Part: ENGINE — LOW PRESSURE · airframe 6,973 hrs · 7,170 cycles

AIRCRAFT DEPARTED KADS TODAY, AT FL300 CREW NOTICED RH ENGINE OIL PRESSURE WAS DROPPING, CREW ELECTED TO SHUTDOWN ENGINE AS A PRECAUTION, CREW DECLARED AN EMERGENCY AND LANDED BACK AT KADS WITH NO ISSUES.

Part: FIRE WARNING — FALSE ACTIVATION (COCKPIT) · airframe 4,076 hrs · 3,211 cycles

CREW REPORTED ON FLIGHT FROM KADS DIRECT KMRF AT FL360 RH FIRE WARNING LIGHT ILLUMINATED, CREW FOLLOWED CHECKLIST AND WARNING LIGHT EXTINGUISHED, CREW DIAGNOSED WARNING LIGHT WAS FALSE. THEY CONTINUED ON WARNING LIGHT CAME ON AGAIN CREW DIVERTED TO KMAF. NO EMERGENCY DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE HAS BEEN PERFORMED NO DEFECTS NOTED AND GROUND OPS CHECK OK. AIRCRAFT FLEW BACK TO KADS WITH NO RH FIRE WARNING LIGHT.

Part: FIRE LOOP — FAILED (LT ENGINE) · airframe 4,042 hrs · 3,182 cycles

LH FIRE LIGHT CAME ON IN FLIGHT WENT OUT AFTER 15 SECONDS OWN ITS OWN AND DIDN'T REOCCUR. GAINED ACCESS TO HOT SECTION FIRE LOOP USED MEGGER TO CHECK FIRE LOOP, LOOP WAS ON RAGGED EDGE OF FAILING INSPECTION AS A PRECAUTION REPLACED LH HOT SECTION FIRE LOOP.

Part: FIRE LOOP — DIRTY (LT ENGINE) · airframe 4,023 hrs · 3,165 cycles

CREW REPORTED ON FLIGHT FROM KLAS DIRECT KEFD AT FL430 LH FIRE WARNING LIGHT ILLUMINATED, CREW FOLLOWED CHECKLIST AND WARNING LIGHT EXTINGUISHED, CREW DIAGNOSED WARNING LIGHT WAS FALSE. THEY CONTINUED ON WARNING LIGHT CAME ON AGAIN CREW DIVERTED TO KABQ. NO EMERGENCY DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. I GOT ON SOUTHWEST AIRLINES FLEW TO ABQ, REMOVED LH ENGINE LOWER COWLING INSPECTED AND CLEANED ACCESSIBLE FIRE LOOPS, RAN ENGINES NO FIRE WARNING LIGHT. I FLEW BACK TO ADS ONBOARD AIRCRAFT FIRE LIGHT DID NOT ILLUMINATE DURATION OF TRIP. AS A PRECAUTION REPLACED LH ENGINE FIRE CONTROL UNIT.

Part: OVERHEAT SENSOR — INTERMITTENT (AFT EQUIP BAY) · airframe 10,322 hrs · 7,620 cycles

CREW REPORTED CLIMBING THROUGH FL 150, RED REAR BAY OVERHEAT LIGHT ILLUMINATED, CREW FOLLOWED CHECKLIST PROCEDURES. LIGHT EXTINGUISHED WHILE STILL CLIMBING THROUGH FL 180 RED REAR BAY OVER HEAT LIGHT ILLUMINATED FOLLOWED BY A BURNING ODOR AND LIGHT SMOKE IN COCKPIT.

Part: ELECTRICAL SYS — ODOR (COCKPIT) · airframe 2,719 hrs · 2,183 cycles

FLIGHT CREW REPORTED HEARING A POPPING SOUND FROM BEHIND THE COCKPIT LT SIDEWALL AREA FOLLOWED BY A SLIGHT ELECTRICAL ODOR FOR A PERIOD OF 15 SECONDS. NO SYSTEMS WERE AFFECTED AS ALL WERE OPERATING NORMALLY FOR THE DURATION OF THE FLIGHT (1.2 HRS). MFG AIRCRAFT SERVICES TECHNICIANS WERE DISPATCHED AND REMOVED ALL LT SIDEWALL PANELS FOR ACCESS. INSPECTION OF ALL ELECTRICAL COMPONENTS, CONNECTORS, AND WIRING REVEALED NO DEFECTS. SUBSEQUENT FLIGHTS WERE ALL UNEVENTFUL.

Part: FUEL CONTROL — FAILED (RT ENGINE)

DURING CLIMBOUT, FLIGHT CREW REPORTED THE RT ENGINE N1 (FAN) OVERSPED TO 116.8 PERCENT. ITT DID NOT EXCEED LIMITS. N2 WAS RT AT RED LINE LIMIT OF 97.0 PERCENT. THE FUEL FLOW WAS EXTREMELY HIGH AT 1300 LBS/HR. FLIGHT CREW RETARDED POWER TO IDLE WITH NO CHANGE IN ENGINE OPERATING PARAMETERS. ENGINE WAS SHUTDOWN AND AIRCRAFT RETURNED AND LANDED SAFELY. SUSPECT FUEL CONTROL FAILURE. SUBSEQUENT FUEL CONTROL TEAR DOWN CONFIRMED THE DRIVE BODY BEARINGS FAILED WHICH RESULTED IN MAJOR INTERNAL DAMAGE.

Part: RELAY — OPEN (STAB TRIM)

HORIZONTAL STABILIZER TRIM WOULD NOT ACTUATE IN THE NOSE-DOWN TRAVEL DIRECTION (MAIN SYSTEM). STANDBY TRIM SYSTEM FUNCTIONED PROPERLY. FOUND THE MAIN CONTACTS OF THE -B- DOWN RELAY IN AN OPEN CIRCUIT CONDITION. REPLACEMENT CONFIRMED FAULT.

Part: PROPELLER — DAMAGED

REPORTING AN ON-GROUND PROPELLER STRIKE INCIDENT THAT OCCURRED ON AIRCRAFT. THE AIRCRAFT WAS ON THE GROUND PERFORMEING PREFLIGHT CHECKS WHEN THE AIRCRAFT ROLLED OFF THE PAVED RUNUP AREA AND THE LT PROP STRUCK AN OBJECT. UPON PRELLIMINARY INSPECTION OF THE PROPELLER, 2 BLADES WILL REQUIRE REPLACEMENT. THE PROP HAS BEEN REMOVED AND FORWARDED TO A REPAIR FACILITY FOR OVERHAUL. THE ENGINE HAS BEEN INSPECTED IAW MM, AND WAS FOUND TO BE SERVICEABLE FOR CONTINUED OPERATION. (K)

Part: TURBINE BLADES — ACTIVATED (NR 2 ENGINE)

NR 2 ENGINE EXPERIENCED AN INTERNAL HOT SECTION FAILURE RESULTING IN COMPLETE LOSS OF POWER AND FLAMEOUT. ALL ENGINE INDICATIONS WERE NORMAL PRIOR TO THE FAILURE. A ROUTINE HOT SECTION BORESCOPE INSPECTION HAD BEEN PERFORMED. 10.2 HOURS PRIOR TO FAILURE. THIS ENGINE IS 340.6 HOURS FROM SCHEDULED 4000 HOUR OVERHAUL. PRELIMIARY INSPECTION REVEALED COMPRESSOR TURBINES BLADES FAILURE IS PROBABLE GAUGE. (K)