# Service difficulty reports: N90S, cancelled Aug 16, 2012 A list on [N90S, cancelled Aug 16, 2012](https://openairdocs.org/deregistered/N90S-2012-08-16.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR 0301549931](https://openairdocs.org/sdr/0301549931.md): Flex Line · leaking · Aug 9, 2003 · N90S · Doug DC931 · Hydraulic System, Main > UPON GEAR EXTENSION FOR LANDING, THE RT HYDRAULIC SYS FLUID QUANTITY WENT TO ZERO. LANDING GEAR LOCKED DOWN AND SAFE WITH NO FURTHER PROBLEMS. AUXILIARY HYD PUMP WAS SHUT OFF AFTER LANDING. NO MENTION OF COM COMPLIANCE OR OF OTHER HYDRAULIC SYSTEM INDICATIONS - [SDR 0204139931](https://openairdocs.org/sdr/0204139931.md): Switch · inoperative · Dec 14, 2002 · N90S · Doug DC931 · Landing Gear Position and Warning > ON CLIMBOUT ALL THREE (GEAR UNSAFE) LIGHTS ILLUMINATED. ALL OTHER INDICATIONS NORMAL. ON GEAR EXTENSION GOT ALL GREEN LIGHTS ILLUMINATED AND (GEAR UNSAFE) LIGHT EXTINGUISHED. ALL OTHER INDICATIONS NORMAL. FLIGHT LANDED WITHOUT INCIDENT. REPLACED SWITCH ASSEMBL - [SDR 0203039931](https://openairdocs.org/sdr/0203039931.md): Skin · cracked · Jul 18, 2002 · N90S · Doug DC931 · Fuselage Main, Plate/Skin > During Hck in ATL, a.125 crack was found on the RH skin adjacent to the wiper cutout area. Repaired per EA 99-190551. - [SDR 0203029975](https://openairdocs.org/sdr/0203029975.md): Angle · cracked · Jul 15, 2002 · N90S · Doug DC931 · Fuselage Main, Structure > During Hck in ATL Maintenance Base, the LH side of the verticle stabilizer attach angle (aft) was found cracked at station 1100. Repaired per EA 99-190557. - [SDR 0203009931](https://openairdocs.org/sdr/0203009931.md): Frame · cracked · Jul 9, 2002 · N90S · Doug DC931 · Fuselage Main, Frame > During HCK in ATL, frames station 389 and 408 were found cracked at longeron 17. Repaired per EA 99-190536. - [SDR 0103779931](https://openairdocs.org/sdr/0103779931.md): Duct · blown · Oct 30, 2001 · N90S · Doug DC931 · Air Distribution System > DURING CLIMBOUT AND UPON REACHING CRUISE ALTITUDE, THE CABIN CONTINUED TO CLIMB. CREW REQUESTED TO DEPART FL240 AND DESCENDED TO 9000 FT FOR THE DURATION OF THE FLIGHT. CABIN ALTITUDE WAS 10,000 FT AT FL240 AND WAS 6000 FT WHEN AIRCRAFT WAS AT 9000 FT. LAND - [SDR 0004289931](https://openairdocs.org/sdr/0004289931.md): Lamp · inoperative · Nov 3, 2000 · N90S · Doug DC931 · Emergency Lighting > DURING LINE CHECK, FOUND EMERGENCY LIGHTS ABOVE TAILCONE SLIDE INOPERATIVE. MAINTENANCE REPLACED THE LAMP. OPERATIONAL CHECK NORMAL. - [SDR 9808049931](https://openairdocs.org/sdr/9808049931.md): Rod End · broken · Apr 29, 1998 · N90S · Doug DC931 · Leading Edge Slat Actuator > DURING APPROACH, SLAT DISAGREEMENT LIGHT ILLUMINATED WITH AIRCRAFT ROLL OF APPROXIMATELY 20 DEGREES ON SLAT EXTENSION. MAINTENANCE FOUND LEFT LOWER SLAT DRIVE CYLINDER ROD END BROKEN. REPLACED ROD END, OPERATIONAL CHECK NORMAL. - [SDR 9807729931](https://openairdocs.org/sdr/9807729931.md): Batteries · discharged · Apr 29, 1998 · N90S · Doug DC931 · Emergency Lighting > DURING LINE MAINTENANCE INSPECTION, FOUND AFT OVERWING EMERGENCY EXIT LIGHTS INOPERATIVE. REPLACED BATTERIES. OPERATIONAL CHECK NORMAL. - [SDR 9806929931](https://openairdocs.org/sdr/9806929931.md): T-Duct · cracked · Apr 20, 1998 · N90S · Doug DC931 · Airfoil Anti/De-ice System > DURING APPROACH, SLAT DISAGREEMENT LIGHT ILLUMINATED WITH ROLL TO THE RIGHT. CREW RECYCLED SLATS WITH SAME RESULTS. FLIGHT WAS RETURNED TO DTW AND LANDED WITHOUT INCIDENT USING FLAPS ONLY. MAINTENANCE FOUND THE RIGHT SLAT BINDING DUE TO RIGHT ANTI-ICE T-DUC - [SDR 9806219931](https://openairdocs.org/sdr/9806219931.md): Power Supply · inoperative · Apr 8, 1998 · N90S · Doug DC931 · Emergency Lighting > DURING LINE MAINTENANCE INSPECTION, FOUND AFT OVERHEAD EMERGENCY LIGHTS INOPERATIVE. REPLACED POWER SUPPLY AND BATTERIES. OPERATIONAL CHECK NORMAL. - [SDR 9804949931](https://openairdocs.org/sdr/9804949931.md): Battery · discharged · Mar 24, 1998 · N90S · Doug DC931 · Escape Slide > DURING PERIODIC CHECK, MAIN CABIN DOOR EVACUATION SLIDE FAILED BATTERY TEST. REPLACED SLIDE. - [SDR 9803349931](https://openairdocs.org/sdr/9803349931.md): Power Supply · inoperative · Feb 25, 1998 · N90S · Doug DC931 · Emergency Lighting > DURING PERIODIC CHECK, FOUND RIGHT AND LEFT OVERWING EMERGENCY EXIT LIGHTS INOPERATIVE. REPLACED THE POWER SUPPLY. OPERATIONAL CHECK NORMAL. - [SDR 9803899931](https://openairdocs.org/sdr/9803899931.md): Bulkhead Doubler · cracked · Feb 14, 1998 · N90S · Doug DC931 · Fuselage Main, Bulkhead > DURING AFT PRESSURE BULKHEAD INSPECTION, FOUND CRACKS IN THE -71 DOUBLER AT THE AFT PRESSURE BULKHEAD UPPER DOOR CUTOUT. REPAIRED PER EA 99-154161. - [SDR 9803889931](https://openairdocs.org/sdr/9803889931.md): Bulkhead Skin · cracked · Feb 14, 1998 · N90S · Doug DC931 · Fuselage Main, Bulkhead > DURING AFT PRESSURE BULKHEAD INSPECTION, FOUND CRACK IN THE AFT PRESSURE BULKHEAD SKIN AT THE UPPER DOOR CUTOUT 11.5 RIGHT OF CENTER LINE. REPAIRED PER EA 99-154161. - [SDR 9803919931](https://openairdocs.org/sdr/9803919931.md): Bulkhead Doubler · cracked · Feb 9, 1998 · N90S · Doug DC931 · Fuselage Main, Bulkhead > DURING AFT PRESSURE BULKHEAD INSPECTION, FOUND CRACKS IN THE AFT PRESSURE BULKHEAD UPPER DOOR CUTOUT -13 DOUBLER. REPAIRED PER EA 99-154161. - [SDR 9803909931](https://openairdocs.org/sdr/9803909931.md): Bulkhead Doubler · cracked · Feb 9, 1998 · N90S · Doug DC931 · Fuselage Main, Bulkhead > DURING AFT PRESSURE BULKHEAD INSPECTION, FOUND CRACK IN THE -9 DOUBLER AT THE AFT PRESSURE BULKHEAD UPPER DOOR CUTOUT. REPAIRED PER EA 99-154161. - [SDR 9803879931](https://openairdocs.org/sdr/9803879931.md): Bulkhead Skin · cracked · Jan 15, 1998 · N90S · Doug DC931 · Fuselage Main, Bulkhead > DURING AFT PRESSURE BULKHEAD INSPECTION, FOUND CRACK IN THE AFT PRESSURE BULKHEAD SKIN AT THE UPPER DOOR CUTOUT 1.75 CENTER LINE. REPAIRED PER EA 99-154161. - [SDR 9722499931](https://openairdocs.org/sdr/9722499931.md): Slide · low pressure · Nov 26, 1997 · N90S · Doug DC931 · Escape Slide > DURING LINE MAINTENANCE INSPECTION, FOUND TAIL CONE EVACUATION SLIDE LOW ON PRESSURE. REPLACED SLIDE, CHECKED OK. - [SDR 9718549931](https://openairdocs.org/sdr/9718549931.md): Oil Temp Ind · failed · Oct 2, 1997 · N90S · Doug DC931 · Engine Oil Temperature > DURING CLIMB, THE RIGHT ENGINE OIL TEMPERATURE INDICATION ENTERED THE CAUTION RANGE. CREW RETURNED TO JFK AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE RIGHT ENGINE OIL TEMPERATURE INDICATOR. ENGINE OPERATIONAL CHECK WAS PERFORMED. ALL PARA - [SDR 9710259931](https://openairdocs.org/sdr/9710259931.md): Batteries · discharged · May 23, 1997 · N90S · Doug DC931 · Emergency Lighting > DURING LINE MAINTENANCE INSPECTION, FOUND OVERHEAD EMERGENCY LIGHTS BETWEEN AFT LAVATORIES AND VENTRAL STAIRS INOPERATIVE. REPLACED BATTERIES, OPERATIONAL CHECK NORMAL. - [SDR 9625629931](https://openairdocs.org/sdr/9625629931.md): Switch · malfunctioned · Nov 30, 1996 · N90S · Doug DC931 · Landing Gear Position and Warning > LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR RETRACTION. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED RIGHT MAIN GEAR DOOR SWITCH AND ADJUSTED RIGHT GEAR DOOR LATCH, OPERATIONAL CHECK NORMAL. - [SDR 9625619931](https://openairdocs.org/sdr/9625619931.md): Switch Striker · out of adjust · Nov 28, 1996 · N90S · Doug DC931 · Landing Gear Position and Warning > LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR RETRACTION. RECYCLED GEAR WITH NO HELP. FLIGHT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE ADJUSTED LEFT MAIN GEAR DOOR SWITCH STRIKER, OPERATIONAL CHECK NORMAL. - [SDR 9625589931](https://openairdocs.org/sdr/9625589931.md): Switch · dirty · Nov 28, 1996 · N90S · Doug DC931 · Landing Gear Position and Warning > LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR RETRACTION. COCKPIT OPERATING MANUAL PROCEDURES WERE FOLLOWED AND AIRCRAFT CONTINUED TO DESTINATION. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENACE CLEANED LEFT MAIN GEAR SWITCH AND ADJUSTED STRIKER BOLT, OP - [SDR 9619879931](https://openairdocs.org/sdr/9619879931.md): Flap Pos Ind · failed · Sep 15, 1996 · N90S · Doug DC931 · Trailing Flap Position Indicating System > AFTER TAKEOFF AND UPON FLAP RETRACTION, THE LEFT FLAP INDICATED FULL RETRACTION WITH RIGHT FLAP INDICATING 15 DEGREES. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED FLAP POSITION INDICATOR AND RESET CIRCUIT BREAKER, OPERATIONAL CHEC - [SDR 9619339931](https://openairdocs.org/sdr/9619339931.md): O-Ring · broken · Aug 30, 1996 · N90S · Doug DC931 · Hydraulic System, Main > RIGHT HYDRAULIC SYSTEM QUANTITY DECREASED TO ONE QUART EN ROUTE. WHEN RIGHT PUMPS WERE TURNED OFF, QUANTITY INCREASED TO FIFTEEN QUARTS. FLIGHT DIVERTED TO MCI AND LANDED WITHOUT INCIDENT. GEAR WAS LOWERED USING ALTERNATE EXTENSION PROCEDURES. MAINTENANCE - [SDR 9618799931](https://openairdocs.org/sdr/9618799931.md): Retract Mech · out of adjust · Aug 26, 1996 · N90S · Doug DC931 · Landing Gear Retraction/Extension System > DURING APPROACH, LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR WAS EXTENDED. GO-AROUND PROCEDURES WERE EXECUTED AND TOWER VISUALLY CONFIRMED THAT GEAR WAS DOWN AND THAT DOORS APPEARED CLOSED. EMERGENCY GEAR EXTENSION PROCEDURES WERE UTILIZED AND AIRCRA - [SDR 9618539931](https://openairdocs.org/sdr/9618539931.md): Valve · malfunctioned · Aug 25, 1996 · N90S · Doug DC931 · Landing Gear Retraction/Extension System > DURING APPROACH, THE LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR WAS EXTENDED. GO-AROUND PROCEDURES WERE EXECUTED AND GEAR WAS RECYCLED. DOOR OPEN LIGHT STAYED ON, EMERGENCY GEAR EXTENSION PROCEDURES WERE UTILIZED AND A SUCCESSFUL LANDING WAS ACCOMPL - [SDR 9618419931](https://openairdocs.org/sdr/9618419931.md): Battery Packs · discharged · Aug 25, 1996 · N90S · Doug DC931 · Emergency Lighting > DURING PERIODIC CHECK, FOUND CABIN EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERY PACKS, OPERATIONAL CHECK NORMAL. - [SDR 9619039931](https://openairdocs.org/sdr/9619039931.md): Pressure Panel · cracked · Aug 23, 1996 · N90S · Doug DC931 · Fuselage Miscellaneous Structure > DURING H-CHECK, FOUND A CRACK IN THE NOSE LANDING GEAR WHEEL WELL HORIZONTAL PRESSURE PANEL AT FS 83, RIGHT SIDE. REPAIRED PANEL (P/N 9910073-3) PER EA 99-110751. - [SDR 9618109931](https://openairdocs.org/sdr/9618109931.md): Fitting · cracked · Aug 17, 1996 · N90S · Doug DC931 · Cargo/Baggage Doors > DURING H-CHECK, FOUND CRACKS IN THE AFT CARGO DOOR BEAM END FITTING, SECOND FROM BOTTOM ON BOTH THE FORWARD AND AFT ENDS AND THE THIRD FROM THE TOP FORWARD END. REPLACED ALL FITTINGS PER SRM 51-30-5. - [SDR 9615619931](https://openairdocs.org/sdr/9615619931.md): Battery Pack · discharged · Jul 15, 1996 · N90S · Doug DC931 · Emergency Lighting > DURING LINE MAINTENANCE INSPECTION, FOUND RIGHT NACELLE EMERGENCY LIGHT INOPERATIVE. REPLACED BATTERY PACK, OPERATIONAL CHECK NORMAL. - [SDR 9604619931](https://openairdocs.org/sdr/9604619931.md): Door Switch · failed · Feb 23, 1996 · N90S · Doug DC931 · Landing Gear Position and Warning > LANDING GEAR DOOR OPEN LIGHT REMAINED ON AFTER GEAR WAS RETRACTED. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPLACED THE LEFT MAIN GEAR DOOR SWITCH AND OPERATIONAL CHECK NORMAL. - [SDR 9519169931](https://openairdocs.org/sdr/9519169931.md): Track · cracked · Nov 7, 1995 · N90S · Doug DC931 · Trailing Edge Flaps > DURING LINE CHECK, FOUND A CRACK IN THE LEFT TRAILING EDGE FLAP TRACK WEB AFT INBOARD END. REPAIRED PER EA 98-105026. - [SDR 9514349931](https://openairdocs.org/sdr/9514349931.md): Oil Temp Sensor · malfunctioned · Sep 16, 1995 · N90S · Doug DC931 · Engine Oil Temperature > MSP - DURING CLIMBOUT, NR 2 ENGINE OIL TEMPERATURE INDICATION EXCEEDED RECOMMENDED LIMITS AND THEN BECAME UNSTABLE. FLIGHT RETURNED TO MSP LANDING WITHOUT INCIDENT. MAINTENANCE REPLACED THE OIL TEMPERATURE SENSOR AND TIGHTENED LOOSE WIRING HARNESS GROUND CON ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE n_number = 'N90S' AND deregistration_id = 'N90S-2012-08-16' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N90S-2012-08-16/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.