N2748Y

Part: O-RING — LEAKING (MASTER CYLINDER) · airframe 34,012 hrs · 36,827 cycles

PILOT REPORTED RIGHT BRAKE FAILURE. MAINTENANCE INSPECTED AND FOUND AN O-RING IN THE RIGHT MASTER CYLINDER BLEEDING BY. RE-SEALED THE RIGHT MASTER CYLINDER WITH NO FURTHER DEFECTS NOTED.

Part: FITTING — CRACKED (LT NACELLE) · airframe 33,789 hrs · 36,529 cycles

DURING MAINTENANCE A CRACK WAS IDENTIFIED ON THE INBOARD LEG OF THE LEFT HAND OUTBOARD NACELLE FITTING, THIS CRACK MEASURES APPROXIMATELY .150 INCHES LONG AND WAS DISCOVERED USING THE LIGHTED BORESCOPE INSPECTION PROCEDURE AS OUTLINED IN MEL-54-02R2 TO SATISFY AD2017-10-09. THIS CRACK CONSISTENT WITH OTHERS THAT HAVE BEEN IDENTIFIED USING THE SAME INSPECTION PROCEDURE. THIS FITTING WILL BE REPLACED USING NEW PARTS.

Part: RIB — CRACKED (LT WING) · airframe 33,742 hrs · 36,447 cycles

DURING MAINTENANCE A CRACK WAS DISCOVERED ON THE LEFT HAND CLOSEOUT RIB (P/N: 5122115-55) AT L.W.S. 106.79. THIS CRACK ORIGINATES FROM A HOLE IN THE FORWARD ROW OF FASTENERS COMMON TO THE AFT MAIN LANDING GEAR TRUNNION SUPPORT PLATE AND TRAVELS FORWARD AN APPROXIMATE LENGTH OF .500 INCHES. THIS RIB WILL BE REPLACED USING NEW PARTS.

Part: SPAR — CRACKED (RT WING) · airframe 33,742 hrs · 36,447 cycles

DURING MAINTENANCE A SMALL CRACK AND SEVERAL AREAS OF CORROSION WERE DISCOVERED ON THE RIGHT HAND AFT SPAR WEB BETWEEN RWS 163.29 AND 229.71. THE CRACK IS AT APPROXIMATE RWS 178.29 ON THE BOTTOM EDGE OF THE WEB ONLY AND MEASURES APPROXIMATELY .228 INCHES LONG. PLEASE NOTE THAT THIS CRACK COULD NOT BE SEEN UNTIL THE LOWER AFT CAP (P/N: 5122041-24) WAS REMOVED. THIS SPAR WEB WILL BE SPLICED AND REPAIRED IN ACCORDANCE WITH REPAIR INSTRUCTIONS AND SUBSTANTIATION REPORT NUMBER AAS-SSR-19-020 REV. NC.

Part: SPAR CAP — CORRODED (RT WING) · airframe 33,742 hrs · 36,447 cycles

DURING MAINTENANCE CORROSION WAS DISCOVERED ON THE RIGHT WING LOWER AFT SPAR CAP (P/N: 5122041-24) AT APPROXIMATE RWS 220.71. THIS CORROSION HAS A MAX DEPTH OF APPROXIMATELY .033 INCHES DEEP. THIS IS GREATER THAN THE MAXIMUM REMOVABLE LIMITS ALLOWED UNDER MEB95-11R1 SECTION 3. THIS CAP WILL BE REPLACED USING NEW PARTS.

Part: SPAR CAP — CORRODED (RT WING) · airframe 33,742 hrs · 36,447 cycles

DURING MAINTENANCE CORROSION WAS DISCOVERED ON THE RIGHT HAND UPPER AFT SPAR CAP (P/N: 5122041-22) AT APPROXIMATE RWS 223.71. THIS CORROSION MEASURES APPROXIMATELY .036 DEEP AND IS GREATER THAN THE MAXIMUM REMOVABLE LIMITS ALLOWED UNDER MEB95-11R1 SECTION 3. THIS CAP WILL BE REMOVED AND REPLACED USING NEW PARTS.

Part: UNKNOWN — ODOR (CABIN) · airframe 33,648 hrs

PILOT REPORTED STRONG SMELL OF SMOKE IN CABIN AFTER TAKE-OFF. MAINTENANCE INSPECTED AIRCRAFT HEATING AND ELECTRICAL SYSTEM WITH NO OBVIOUS DEFECTS NOTED. REPLACED THE AVIONICS MASTER SWITCH AS A PRECAUTIONARY MEASURE. NO DEFECTS NOTED.

Part: SWITCH — BURNED (COCKPIT) · airframe 33,557 hrs · 36,201 cycles

PILOT REPORTED, WHEN NAV SWITCH ACTUATED SMOKE CAME OUT OF SWITCH WHILE MASTER SWITCH ON. INSPECTION FOUND THE NAV LIGHT SWITCH BURNT. MAINTENANCE REPAIRED WIRING IN LEFT WING TIP AND REPLACED NAV LIGHT SWITCH WITH NO FURTHER DEFECTS NOTED.

Part: BULKHEAD — CRACKED (FRAME 14) · airframe 33,450 hrs · 35,999 cycles

AFTER DEPARTURE AND CLIMBING THROUGH 800 FT MSL THE AIRCRAFT FLEW THROUGH A FLOCK OF BIRDS. BOTH WINDSHIELDS WERE DAMAGED AND THE AIRCRAFT MADE AN UNEVENTFUL LANDING. SUBSEQUENT INSPECTION FOUND THE FUSELAGE BULKHEAD AT STATION 14.25 (OEM PN 5213025-21) IS SIGNIFICANTLY DAMAGED. THIS BULKHEAD IS SPECIFICALLY REFERENCED AS A ‘MAJOR STRUCTURAL MEMBER’ IN SECTION 6-20-01 OF THE AMM. THE CENTER WINDSHIELD STRUCTURAL MEMBER AND UPPER WINDSHIELD CIRCUMFERENTIAL FRAME (CENTER) ARE DAMAGED. THESE AREAS ARE IDENTIFIED AS ‘PRINCIPAL STRUCTURAL ELEMENTS’ IN SECTION 5-13-00 OF THE AMM. WE ARE GOING TO MAKE AN INITIAL NOTIFICATION TO THE NTSB BASED ON THIS INITIAL DAMAGE ASSESSMENT.

Part: EXHAUST VALVE — DAMAGED (NR 6 CYLINDER) · airframe 32,909 hrs

CYLINDER REMOVED DUE TO LOW COMPRESSION AT INSPECTION. EXHAUST VALVE DISPLAYS EVIDENCE OF HEAT DAMAGE.

Part: GOVERNOR — DEFECTIVE (LT ENGINE) · airframe 32,275 hrs · 33,662 cycles

PILOT REPORTED LT ENG PROP FEATHERS BEFORE DETENT. LUBRICATED THE PROP GOVERNOR CABLE, R & R LT ENG PROP GOVERNOR. OPERATIONAL & LEAK CHECK GOOD.

Part: NUT — MISSING (PROP CONTROL) · airframe 31,880 hrs · 32,812 cycles

PILOT REPORTED RT PROPELLER STUCK AT RED LINE. INSPECTED & FOUND PROP GOVERNOR CONTROL CABLE ROD END NUT MISSING. INSTALLED NEW SPACER & NUT. OPERATIONS CHECKED WITH NO FURTHER DEFECTS NOTED.

Part: MASTER CYLINDER — CONTAMINATED (BRAKE SYSTEM) · airframe 30,877 hrs · 30,723 cycles

UPON LANDING IN SJU FLIGHT 4481 LT BRAKE INOPERATIVE. COMPANY MX BLED AIR FROM LT MASTER CYLINDER & RE-SERVICED MASTER CYLINDER WITH HYD FLUID IAW MANUFACTURERS SERVICE INSTRUCTIONS.

Part: CALIPER — INOPERATIVE (ZONE 700) · airframe 26,660 hrs

CREW REPORTED, AFTER LANDING AND EXITING RUNWAY, RT BRAKE FAILED ON TAXIWAY. ACFT EXITED TAXIWAY, ONTO GRASS AREA. MX INSPECTED ACFT, NO DAMAGE NOTED. MX REMOVED AND REPLACED RT BRAKE CALIPER ASSY. SYS CHECKS OK, ACFT RELEASED BACK TO SERVICE.

Part: MASTER SWITCH — UNSERVICEABLE (COCKPIT) · airframe 26,049 hrs

CREW REPORTED AVIONICS MASTER SWITCH INOPERATIVE. MX REMOVED AND REPLACED AVIONICS MASTER SWITCH.

Part: MASTER SWITCH — UNSERVICEABLE (COCKPIT) · airframe 260,049 hrs

CREW REPORTED AVIONICS MASTER SWITCH INOPERATIVE. MX REMOVED AND REPLACED AVIONICS MASTER SWITCH.

Part: CIRCUIT BREAKER — DEFECTIVE (COCKPIT)

CREW REPORTED AVIONICS MASTER SWITCH INOP. MX CHANGED CIRCUIT BREAKER SWITCH.

Part: RELAY — FAILED (LT STAB WING)

AIRCRAFT LOST ELECTRICAL POWER, AIRCRAFT LANDED WITHOUT INCIDENT. MECHANIC FOUND RT STARTER RELAY FAILED IN ON POSITION. MECHANIC CHANGED THE RELAY, RT STARTER AND AIRCRAFT BATTERY, THEN RETURNED AIRCRAFT TO SERVICE.

Part: MASTER SWITCH — FAILED (LT SWITCH PANEL)

AVIONIC MASTER SWITCH FAILED IN FLIGHT, CREW USED ALTERNATE MASTER (BACKUP). MAINTENANCE PLACE THE SWITCH AND RETURNED THE SWITCH AND RETURNED THE AIRCRAFT TO SERVICE.