Aero National Inc

Part: WARNING MESSAGE — ILLUMINATED · airframe 6,428 hrs · 5,427 cycles

DURING CLIMB, THE GEAR UNLOCKED ANNUNCIATOR ILLUMINATED ALONG WITH THE HYD PRESS ON ANNUNCIATOR. BOTH WERE ASSOCIATED WITH THE LOUD BANGING NOISE COMING FROM THE NOSE OF THE AIRCRAFT.

Part: DUCT — DISLODGED (ZONE 100) · airframe 5,901 hrs · 5,758 cycles

CREW REPORTED A DEPRESSURIZATION EVENT WITH MASK DEPLOYMENT. FLIGHT CREW DECLARER AND EMERGENCY WITH ATC AND FOLLOWED THE ABNORMAL PROCEDURES CHECKLIST AND LANDED AT KPHL WITHOUT INCIDENT. MAINTENANCE ARRIVED AND INSPECTED AIRCRAFT FINDING ONE OF THE PRESSURIZATION DUCT JOINTS HAD MIGRATED OUT OF POSITION CAUSING THE CABIN DEPRESSURIZATION. THE DUCTS, JOINT, AND SURROUNDING AREA WERE INSPECTED FOR DAMAGE WITH NONE NOTED. THE FLEX JOINT WAS REINSTALLED AND SYSTEM OPS CHECKED WITH SATISFACTORY RESULTS.

Part: ACM — DAMAGED · airframe 5,753 hrs · 5,652 cycles

DURING THE CLIMB OUT, WHEN PASSING THROUGH 2,000 FEET THE CREW EXPERIENCED THE OPENING OF THE EMERGENCY PRESSURIZATION VALVE CAUSING THE CABIN TEMP TO INCREASE AND LIGHT SMOKE/"HOT" SMELL IN THE CABIN. AT THIS TIME THE CREW DECLARED AN EMERGENCY, MANUALLY DROPPED THE PAX OXYGEN MASK AND RETURNED TO THE DEPARTURE AIRPORT WITHOUT INCIDENT. DURING THE EVALUATION BY MAINTENANCE PERSONAL IT WAS DISCOVERED THAT THE INLET SIDE OF THE AIR CYCLE MACHINE HAD SUSTAINED DAMAGE FROM WHAT APPEARS TO BE INLET TURBINE FAILURE.

Part: SERVO — BINDING (ELEVATOR CONTROL) · airframe 8,617 hrs · 6,795 cycles

AUTOPILOT DISCONNECTED UNCOMMANDED DURING DESCENT. AIRCRAFT EXHIBITED UNCOMMANDED PITCH TRIM INPUT RESULTING IN NOSE-DOWN ATTITUDE REQUIRING SIGNIFICANT MANUAL CONTROL INPUT. AFTER PULLING PITCH TRIM CB AND RESETTING AUTOPILOT, AIRCRAFT THEN EXHIBITED UNCOMMANDED NOSE-UP ATTITUDE ON AUTOPILOT RE-ENGAGEMENT. ISSUE SUSPECTED WITH PITCH TRIM AND/OR AUTOPILOT SYSTEM. THIS ALSO HAPPENED WITH THE AUTO PILOT DISCONNECTED, AND PITCH-TRIM CB PUSHED BACK IN. THE PILOTS TRIED TO MANUAL TRIM THE AIRCRAFT WITH THE MANUAL TRIM WHEEL, AND PITCH TRIM CB PUSHED IN. AT FIRST COULD NOT TRIM THE AIRCRAFT AND THEN A SUDDEN ABRUPT PITCH UP FOLLOWED BY AN AGGRESSIVE PITCH DOWN. ELEVATOR SERVO WAS FOUND TO BE THE ISSUE WITH THE SYSTEM AND REPLACED WITH OVERHAULED.

Part: ATTACH FITTING — CRACKED (ZONE 300) · airframe 20,417 hrs · 17,279 cycles

ON PHASE 17 NDI INSPECTION, FOUND CRACKS AT BOTH UPPER/OUTER HOLES ON FORWARD STABILIZER ATTACHMENT FITTING.

Part: SEAT — BROKEN

(GVRR) UPPER SEAT BASE ASSY CRACKED AT CHAIR BACK ATTACH POINTS. STRESS ON CHAIR BACK AND METAL FATIGUE PROBABLE CAUSE. ALSO, PREVIOUS INAPPROPRIATE REPAIR. CHAIR WAS REPAIRED IAW STC ST01042WI.

Part: SCAVENGE PUMP — INOPERATIVE (LT ENGINE)

WHILE TAXIING FOR TAKEOFF, THE LT ENGINE LOST OIL PRESSURE AND SMOKE WAS COMING OUT EXHAUST, SHUT ENGINE DOWN BEFORE THE PSI DROPPED BELOW 40 PSI. INSPECTED ENGINE AND FOUND OIL PUMP/SCAVANGE PUMP (PN 310426801, SN OP0764) INOPERATIVE, INSTALLED O/H PUMP (PN 3104268, SN OP1054). OPS CHECK WAS GOOD.

Part: DRIVE GEAR — BROKEN (GOVERNOR)

PILOT REPORTS RT ENGINE WENT INTO FEATHER AND SHUT DOWN DURING FLIGHT, AFTER INSPECTION, FOUND RT GOVERNOR DRIVE GEAR SHEARED FROM GOVERNOR, THE THREE JOINTS THAT ATTACH THE DRIVE GEAR TO THE GOVERNOR HAD BEEN BROKEN OFF ALLOWING GEAR TO COME OUT. AFTER REVIEW OF THE THREE PIECES, IT LOOKED LIKE THEY HAD BEEN PARTIALLY BROKEN FOR A WHILE. (K)