# Service difficulty reports: N423AS

A list on [N423AS](https://openairdocs.org/aircraft/N423AS.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

Page 1 of 6 · 262 reports

- [SDR ASAA2024091652586](https://openairdocs.org/sdr/ASAA2024091652586.md): Lens · wrong part · Sep 16, 2024 · N423AS · Boeing 737990ER · Emergency Lighting
  > 17ABC LOWER EMERGENCY EXIT SIGNS ARROW POINTS INCORRECT DIRECTION. GROUNDED - YES. REMOVED AND REPLACED LOWER EMERGENCY EXIT SIGNS LENS COVER @ 17ABC REF AMM 33-51-01. OPS TEST GOOD.
- [SDR ASAA2024061351084](https://openairdocs.org/sdr/ASAA2024061351084.md): Floorbeam · corroded · Jun 13, 2024 · N423AS · Boeing 737990ER · Fuselage Main, Floor Beam
  > STA 947 FLOOR BEAM CORRODED AT RBL-48 ON UPPER TEE UNDER LAV MOUNT. GROUNDED - YES. REPAIRED FLOOR BEAM ON STA 947 RBL 0 & RBL 54 IAW B737-900 SRM 53-70-51-2R-5 REPAIR #5 AND EA 900ER-53EA-27198 REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-900 SR
- [SDR ASAA2024061251088](https://openairdocs.org/sdr/ASAA2024061251088.md): Web · corroded · Jun 12, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT GALLEY FLOOR STRUCTURE BETWEEN STA 1016 AND AFT PRESSURE BULKHEAD HAS CORROSION IN MULITPLE AREAS. GROUNDED - YES. REMOVED DAMAGE FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-70-51-1A-1, REMVOED AND REPLACED IAW B737-900 SRM 51-40-02-0G-0W= 1" O=.010 R=
- [SDR ASAA2024061251087](https://openairdocs.org/sdr/ASAA2024061251087.md): Web · corroded · Jun 12, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT WET AREA SILL WEB HAS MULTIPLE AREAS OF CORROSION BETWEEN STA 986 TO STA 1006 RBL-28 TO RBL-42. GROUNDED - YES. REMVOED CORROSION FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-70-51-1A-1 REMVOED AND REPLACED SILL WEB IAW B737-900 SRM 51-40-02-0G-0W= 1.0 O=
- [SDR ASAA2024061251086](https://openairdocs.org/sdr/ASAA2024061251086.md): Web · corroded · Jun 12, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT WET AREA SILL WEB CORRODED AT STA 1030 RBL-28. GROUNDED - YES. REMOVED CORROSION, FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-70-51-1A-1, REMOVED AND REPLACED AFT WET AREA SILL WEB IAW B737-900ER SRM 51-40-021-0G-0W= 1IN O=.070 R=.046 L= 2IN D=.024.
- [SDR ASAA2024061251085](https://openairdocs.org/sdr/ASAA2024061251085.md): Sill Drain · corroded · Jun 12, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT PASSENGER CABIN FLOOR STRUCTURE AT AFT SERVICE DOOR (R2) HAS CORROSION. GROUNDED - YES. REMOVED DAMAGE, FOUND TO BE OUT OF LIMITS, REMOVED AND REPLACED R2 DOOR MOP SILL IAW B737-900 SRM 51-40-02-0G-0 AND SRM 53-70-15-1A-1W= 2" O=.080 R=.054 L= 1" D=.026
- [SDR ASAA2024061250743](https://openairdocs.org/sdr/ASAA2024061250743.md): Intercostal · cracked · Jun 12, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > INTERCOSTAL AT STRINGER 21L STA 967 TO 986 IS CRACKED. FOUND UPON REMOVAL FOR STRINGER REPAIR. GROUNDED - YES. REMOVED INTERCOSTAL, FABRICATED INTERCOSTAL, AND INSTALLED INTERCOSTAL IAW B737-900 SRM 51-40-02-0G-0, BOEING DWG 147A8801-95.
- [SDR ASAA2024061150752](https://openairdocs.org/sdr/ASAA2024061150752.md): Transition Panel · corroded · Jun 11, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO L/H TRANSITION FS 500-500C+15 HAS AREAS OF CORROSION. GROUNDED - YES. REMOVED DAMAGE, FOUND TO BE OUT OF LIMITS. REPAIRED IAW B737-900 SRM 53-00-53-2R-5W= 2IN O=.040 R= 0.031 L= 1IN D= 0.009.
- [SDR ASAA2024061150750](https://openairdocs.org/sdr/ASAA2024061150750.md): Transition Panel · corroded · Jun 11, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO L/H TRANSITION FS 500C+15-500L HAS AREAS OF CORROSION. GROUNDED - YES. REMOVED DAMAGE, FOUND TO BE OUT OF LIMITS. REPAIRED IAW B737-900 SRM 53-00-532R-5W= 2IN O= 0.040 R= 0.035 L= 1IN D= 0.005.
- [SDR ASAA2024061150746](https://openairdocs.org/sdr/ASAA2024061150746.md): Cargo Track · corroded · Jun 11, 2024 · N423AS · Boeing 737990ER · Fuselage, Seat/Cargo Attach Fittings
  > FWD CARGO R/H CARGO TRACK FS 500J-FS 500L RBL 14 CORRODED AROUND FASTENER HOLES. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2 REPAIRED IAW B737-900ER SRM 53-00-53-2R-2 REPAIR 3W= 1.0 O=.070 R=.052 L= 2.0 D=.018.
- [SDR ASAA2024061150745](https://openairdocs.org/sdr/ASAA2024061150745.md): Cargo Track · corroded · Jun 11, 2024 · N423AS · Boeing 737990ER · Fuselage, Seat/Cargo Attach Fittings
  > FWD CARGO L/H CARGO TRACK FS 500J-500L LBL 14 CORRODED AROUND FASTENER HOLES. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT LIMITS IAW BOEING 7373-900 SRM 53-00-53-1A-2, REPAIRED IAW BOEING 737-900 SRM 53-00-53-2R-2W= 1.0 O=.070 R=.037 L= 2.0 D=.033.
- [SDR ASAA2024061150519](https://openairdocs.org/sdr/ASAA2024061150519.md): Channel · corroded · Jun 11, 2024 · N423AS · Boeing 737990ER · Fuselage Main, Structure
  > FWD CARGO RH TRANSITON FS 500A-500F+10 HAS AREAS OF CORROSION. GROUNDED - YES. REMOVED CORR, FOUND TO BE OUT OF LIMITS IAW B737-900 SRN 53-1A-2, REPAIRED TRANSITON PNL BETWEEN STA 500A TO 500F IAW B737-900 SRM 53-00-53-2R-5.
- [SDR ASAA2024061050753](https://openairdocs.org/sdr/ASAA2024061050753.md): Shield · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO SHIELD AT RBL-21 CORRODED BETWEEN STA 767 TO STA787. GROUNDED - YES. BLENDED DAMAGE FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1. REMOVED AND REPLACED B737-900 SRM 51-40-02-0G-0W= 1.00 O=.050 R=.042 L= 2.25 D=.008.
- [SDR ASAA2024061050749](https://openairdocs.org/sdr/ASAA2024061050749.md): Transition Panel · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO L/H TRANSITION PANEL CORRODED BETWEEN STA 727+4" TO STA 727E+10". GROUNDED - YES. REMOVED CORROSION, FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2. REPAIR L/H TRANSITION PANEL IAW B737-900 SRM 53-00-53-2R-5W= 2.00 O=.040 R=.035 L= 3.00 D
- [SDR ASAA2024061050748](https://openairdocs.org/sdr/ASAA2024061050748.md): Web · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO DOOR SURROUND LOWER SILL WEB CORRODED BETWEEN STA 807 TO STA 847. GROUNDED - YES. REMOVED AND REPLACED AFT CARGO DOOR SURROND LOWER SILL WED IAW B737-900 SRM 51-40-02-0G-0 REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-900 SRM 53-60-15-1A
- [SDR ASAA2024061050747](https://openairdocs.org/sdr/ASAA2024061050747.md): Transition Panel · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO L/H TRANSITION PANEL CORRODED BETWEEN STA 727I+8" TO STA 847. GROUNDED - YES. REMOVED CORROSION, FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2. REPAIRED L/H TRANSITION PANEL IAW B737-900 SRM 53-00-53-2R-5. W= 2.00 O=.040 R= 0 L= 3.00 D=.
- [SDR ASAA2024061050744](https://openairdocs.org/sdr/ASAA2024061050744.md): Transition Panel · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO L/H TRANSITION PANEL CORRODED BETWEEN STA 727E+10" TO STA 727I+8". GROUNDED - YES. REMOVED CORROSION, FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-00-53-1A-2. REPAIRED L/H TRANSITION PANEL IAW B737-900 SRM 53-00-53-2R-5.W= 2.00 O=.040 R=.035 L= 3.
- [SDR ASAA2024061050742](https://openairdocs.org/sdr/ASAA2024061050742.md): Cargo Track · cracked · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage, Seat/Cargo Attach Fittings
  > AFT CARGO R/H CARGO TRACK AT RBL-13.84 CRACKED AT STA 727J AND STA 727I. GROUNDED - YES. REPAIRED AFT CARGO R/H TRACK AT RBL-13.84 AT STA 727J AND STA 727I IAW B737-900 SRM 53-00-53-2R-3.
- [SDR ASAA2024061050741](https://openairdocs.org/sdr/ASAA2024061050741.md): Transition Panel · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO R/H TRANSITION PANEL CORRODED BETWEEN STA 727+4" TO STA 727C+10". GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-900 SRM 53-00-53-1A-2 REPAIRED TRANSITION PANEL IAW BOEING 737-900 SRM 53-00-53-2R-5W=1.00 O=.040 R=0.00 L=3.
- [SDR ASAA2024061050740](https://openairdocs.org/sdr/ASAA2024061050740.md): Transition Panel · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO R/H TRANSITION PANEL CORRODED BETWEEN STA 727I+8" TO STA 767. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-900 SRM 53-00-53-1A-2, REPAIRED TRANSITION IAW B737-900 SRM 53-00-53-2R-5W=1.0 O=.040 R=0.00 L=3.00 D=.040.
- [SDR ASAA2024061050739](https://openairdocs.org/sdr/ASAA2024061050739.md): Transition Panel · corroded · Jun 10, 2024 · N423AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO R/H TRANSITION PANEL CORRODED BETWEEN STA 727C+10" TO STA 727I+8". GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-900 SRM 53-00-53-1A-2, REPAIRED TRANSITION PANEL IAW BOEING 737-900 SRM 53-00-53-2R-5W-1.00 O=.040 R=.000 L=
- [SDR ASAA2024060651665](https://openairdocs.org/sdr/ASAA2024060651665.md): Battery · failed · Jun 6, 2024 · N423AS · Boeing 737990ER · Emergency Lighting
  > DURING OP CHECK BOTH L2 AND R2 DOOR BATTERY PACKS FAILED. GROUNDED - YES. REMOVED AND REPLACED BOTH L2 AND R2 DOOR BATTERIES S/N 402680 & 401580. OP CHECK GOOD IAW B737-900ER AMM 33-51-06-960-805.
- [SDR ASAA2023110245988](https://openairdocs.org/sdr/ASAA2023110245988.md): Wire Harness · faulty · Nov 2, 2023 · N423AS · Boeing 737990ER · Engine Fuel System Wiring
  > PIECE OF ELECTRICAL CONNECTOR FELL OUT OF #1 ENGINE WHILE OPENING REVERSER. ALT. DEACTIVATION PROCEDURES USED PER CHP 5, TABLE 3, ITEM 7. GROUNDED - YES. FOUND CONNECTOR DP1102 DAMAGE & DISCONNECTED FROM ENG #1 BEED AIR REGULATOR. ENG HARNESS MW0311 REQUIRES R
- [SDR ASAA2023090344911](https://openairdocs.org/sdr/ASAA2023090344911.md): Sensor · faulty · Sep 3, 2023 · N423AS · Boeing 737990ER · APU Oil System
  > APU FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED APU OIL TEMP. SENSOR REF. AMM 49-94-21. OPS CHECK GOOD. LEAK CHECK GOOD. RAN APU BITE, NO FAULT FOUND. OIL TEMP REMAIN 88' C UNDER LOAD. THIS CLEAR MEL 49-1B. SEAMC SCOTT NOTIFIED.
- [SDR ASAA2023082044703](https://openairdocs.org/sdr/ASAA2023082044703.md): Unknown · unknown · Aug 20, 2023 · N423AS · Boeing 737990ER · Cabin Temperature Control System
  > WE HAD DIFFICULTY KEEPING THE MID-CABIN COOL. FLIGHT DECK COLD. AFT CABIN VERY COLD. THE MIOD CABIN QUITE WARM. ALL TEMP CONTROLLERS IN AN UNUSUALLY COLD POSITION. GROUNDED - YES. PERFORMED BITE OF PACK ZONE TEMP CONTROLLER #1 + #2, NO FAULTS FOUND, REF AMM 21
- [SDR ASAA2023072244203](https://openairdocs.org/sdr/ASAA2023072244203.md): Unknown · unknown · Jul 22, 2023 · N423AS · Boeing 737990ER · Compressor Bleed Control
  > ENG #1 LEAKING FUEL. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023062443712](https://openairdocs.org/sdr/ASAA2023062443712.md): Unknown · unknown · Jun 24, 2023 · N423AS · Boeing 737990ER · APU Oil System
  > APU GENERATOR FELL OFFLINE JUST PRIOR TO PUSHBACK. FAULT LIGHT ILLUMINATED. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023051543211](https://openairdocs.org/sdr/ASAA2023051543211.md): Unknown · unknown · May 11, 2023 · N423AS · Boeing 737990ER · Autopilot System
  > ON CLIMBOUT, A/P B AND A/P A WOULD NOT ENGAGE. RECYCLED F/D AND BOTH AUTOPILOTS OPERATE NORMALLY DURING CLIMB & CRUISE. GROUNDED - YES. ACCOMPLISHED B737-900 FIM TASK 22-11 TASK 856. INCLUDING BITE TEST PER B737-900 AMM TASK 22-11-00-740-806. BOTH AUTO TEST AN
- [SDR ASAA2023032942660](https://openairdocs.org/sdr/ASAA2023032942660.md): Valve · faulty · Mar 29, 2023 · N423AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CAB ZONE TEMP LT ILLUM ON RECALL. GROUNDED - YES. R/R FLIGHT DECK TRIM MODULATING VALVE IAW B737-900 AMM 21-61-21.
- [SDR ASAA2023032742613](https://openairdocs.org/sdr/ASAA2023032742613.md): Unknown · unknown · Mar 27, 2023 · N423AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CABIN ZONE TEMP LIGHT ILLUMINATES ON RECALL CLEARS WITH M/C RESET. GROUNDED - YES. BITE SHOWS FLT DECK TRIM VALVE FAULT. WAS ABLE TO RESET FAULT. CONT CAB TEMP CONTROL OPS CHECK GOOD I/A/W B737-900 FIM 21-62 TASK 833.
- [SDR ASAA2023032642574](https://openairdocs.org/sdr/ASAA2023032642574.md): Unknown · unknown · Mar 26, 2023 · N423AS · Boeing 737990ER · Flight Management Computing Hardware System
  > BOTH FMC'S FAILED MOMENTARILY THEN RECOVERED (CONCURRENT WITH HITTING SEND ON A CPDLC MSG) CPDLC DATA LINK FAILED AND RECOVERED AT THE SAME TIME. GROUNDED - YES. BOTH FMC'S AND CPDLC OPS CHECK GOOD.
- [SDR ASAA2023012241615](https://openairdocs.org/sdr/ASAA2023012241615.md): Probe · out of range · Jan 22, 2023 · N423AS · Boeing 737990ER · Engine Oil Temperature
  > THE ENGINE OIL TEMPERATURE SIGNAL (TEO) IS OUT OF RANGE (MESSAGE # 79-11101), LONG TIME FAULT, #1 ENGINE. GROUNDED - YES. REMOVED & REPLACED OIL TEMPERATURE SENSOR REF B737-900 AMM 79-34-02.
- [SDR ASAA2023011071464](https://openairdocs.org/sdr/ASAA2023011071464.md): Modulating Valve · failed · Jan 7, 2023 · N423AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CAB ZONE TEMP LIGHT ON WITH MASTER CAUTION. GROUNDED - YES. R/H PACK/ZONE TEMP CONTROLLER SHOWS HARD FAIL FLIGHT DECK TCV (V143) FAULT. REMOVED & REPLACED TCV REF B737-900 AMM 21-61-21. ORIG SUB DATE: 1/10/2023
- [SDR ASAA2022123041309](https://openairdocs.org/sdr/ASAA2022123041309.md): Compensator · out of limits · Dec 30, 2022 · N423AS · Boeing 737990ER · Fuel Indicating System
  > LEFT FUEL QTY INDICATION BLANK FOR 10 SECONDS DURING PREFLIGHT. GROUNDED - YES. REPLACED TANK UNIT 2 PER B737-900 AMM 28-41-21/401. REPLACED THE COMPENSATOR PROBE AND TANK UNIT #1 PER AMM 28-41-21/401.
- [SDR ASAA2022121941209](https://openairdocs.org/sdr/ASAA2022121941209.md): Warning Message · false activation · Dec 19, 2022 · N423AS · Boeing 737990 · Cabin Temperature Control System
  > CONT CABIN ZONE TEMP LIGHT ILLUMINATED. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 21-53 TASK 821, OPS NML. ACCOMPLISHED PACK/ZONE TEMP CONT BITE TEST, OPS NML, GREEN, REF FIM 21-62 TASK 801. GROUND VERIFICATION SUCCESSFUL. ORIG SUB DATE: 12/23/2022
- [SDR ASAA2022120641039](https://openairdocs.org/sdr/ASAA2022120641039.md): Filter · warning message · Dec 6, 2022 · N423AS · Boeing 737990ER · Cabin Temperature Control System
  > CONT CAB ZONE LIGHT ON RECALL. EXTINGUISHES ON RESET. GROUNDED - YES. RELEASED PER ASA MEL 21-21G FLIGHT DECK PRIMARY TEMP CONTROL INOP. BITE TEST OF R PZTC FAULTED FLT DECK/TRIM VALVE ON BIT & PREV FLT. VERIFY PASSES. RESET PZTC. REMOVED & REPLACED CABIN TEMP
- [SDR ASAA2022120341024](https://openairdocs.org/sdr/ASAA2022120341024.md): None · none · Dec 3, 2022 · N423AS · Boeing 737990ER · Fuel Indicating System
  > DURING PRE-FLIGHT, LEFT FUEL INDICATOR WAS BLANK FOR 10 SECS AND CAME BACK ON INDICATING 400-500 LBS LESS. GROUNDED - YES. REF B737-900 FIM 28-41 TASK 813 AND TASK 814 NO DEFECTS DETECTED AT THIS TIME.
- [SDR ASAA2022111940844](https://openairdocs.org/sdr/ASAA2022111940844.md): A/C Pack · warning light · Nov 19, 2022 · N423AS · Boeing 737990ER · Cabin Cooling System
  > LEFT PACK LIGHT ILLUMINATED. RAN QRH, RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. BITE OF LEFT PACK TEMP CONTROLLER SHOWS TCV FAULT LAST LEG. BITE OF CONTROLLER OPS NORMAL AND FAULT CLEARS REF B737-900 AMM 21-61-20-400-801.
- [SDR ASAA2022110240634](https://openairdocs.org/sdr/ASAA2022110240634.md): Actuator · failed · Nov 2, 2022 · N423AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT PACK LIGHT COMES ON WITH MASTER CAUTION & EXTINGUISHED WHEN MASTER CUASTION RESET. GROUNDED - YES. REMOVED & REPLACED RH RAM AIR ACTUATOR REF B737-900 AMM 21-51-21 OPS CHK GOOD MX PROCEDURES.
- [SDR ASAA2022102540479](https://openairdocs.org/sdr/ASAA2022102540479.md): Sensor · faulted · Oct 25, 2022 · N423AS · Boeing 737990ER · Fuel Quantity Indicator
  > RIGHT MAIN TANK FUEL QTY & TOTAL WENT BLANK ONCE AIRBORNE. CAME BACK ONCE WE LANDED. GROUNDED - YES. AIR TURNBACK. REMOVED AND REPLACED FUEL TANK UNITS 7, 8, 3, 10 REF B737-900 AMM 28-41-21/401. #2 FQIS SYSTEM TEST GOOD AT 397.2 PICO FARADS REF AMM 28-41-00-7
- [SDR ASAA2022101740391](https://openairdocs.org/sdr/ASAA2022101740391.md): Actuator · faulty · Oct 17, 2022 · N423AS · Boeing 737990ER · Cabin Cooling System
  > R PACK LIGHT ILLUMINATES ON MASTER CAUTION RECALL. EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED & REPLACED RH RAM AIR ACTUATOR REF B737-900 AMM 21-51-2, OPS CHECK GOOD.
- [SDR ASAA2022101540315](https://openairdocs.org/sdr/ASAA2022101540315.md): Harness · failed insp · Oct 15, 2022 · N423AS · Boeing 737990ER · Detection System
  > #2 ENG FIRE DETECTION LOOP B WILL NOT TEST PROPERLY. GROUNDED - YES. REPLACED MW0326 HARNESS & INSTALLATION TEST GOOD B737-900 AMM 26-11-02.
- [SDR ASAA2022101540312](https://openairdocs.org/sdr/ASAA2022101540312.md): Actuator · faulted · Oct 15, 2022 · N423AS · Boeing 737990ER · Cabin Cooling System
  > RIGHT PACK LIGHT ILLUMINATES ON MASTER RECALL. EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. ACCOMP PZTC BITE CK REF B737-900 FIM 21-62 TASK 801. RECORDED RAM AIR ACT FAULT R/H PACK. ACCOMP FIM 21-62 TASK 836. FAULT CLEARED RE-ACCOMPLISHED PZTC BITE CK
- [SDR ASAA2022100640172](https://openairdocs.org/sdr/ASAA2022100640172.md): Battery Pack · failed · Oct 6, 2022 · N423AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY BATTERY PACK M1676 FAILS OPS CHECK. GROUNDED - YES. REMOVED AND REPLACED M1676 BATTERY PACK AND POWER SUPPLY M1676 IAW B737-900 AMM 33-51-06. OPS CHECK GOOD IAW B737NG AMM 33-51-06.
- [SDR ASAA2022100440173](https://openairdocs.org/sdr/ASAA2022100440173.md): Battery Pack · failed · Oct 4, 2022 · N423AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT BATTERY PACK M2335 FAILS OPS CHECK. GROUNDED - YES. REMOVED AND REPLACED M2335 POWER SUPPLY AND BATTERY PACK IAW B737-900 AMM 33-51-06-960-806. OPS CHECK GOOD AMM 33-51-06.
- [SDR ASAA2022100440171](https://openairdocs.org/sdr/ASAA2022100440171.md): Battery Pack · failed · Oct 4, 2022 · N423AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY BATTERY PACK M1670 FAILS OPS CHECK. GROUNDED - YES. REMOVED AND REPLACED M1670 BATTERY PACK AND POWER SUPPLY IAW B737-900 AMM 33-51-06. OPSCHECK GOOD AMM 33-51-06.
- [SDR ASAA2022100440170](https://openairdocs.org/sdr/ASAA2022100440170.md): Battery Pack · failed · Oct 4, 2022 · N423AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY BATTERY PACK M1671 FAILS OPS CHECK. GROUNDED - YES. REMOVED AND REPLACED M1671 BATTERY PACK AND POWER SUPPLY IAW B737-900 AMM 33-51-06. OPS CHECKS GOOD AMM 53-51-06.
- [SDR ASAA2022100440169](https://openairdocs.org/sdr/ASAA2022100440169.md): Battery Pack · failed · Oct 4, 2022 · N423AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY BATTERY PACK M2626 FAILS OPS CHECK. GROUNDED - YES. REMOVED AND REPLACED M2626 BATTERY PACK AND PWR SUPPLY IAW B737-900 AMM 33-51-06.OPS CHECKS GOOD AMM 33-51-06.
- [SDR ASAA2022051938387](https://openairdocs.org/sdr/ASAA2022051938387.md): Magnetic Plug · broken · May 19, 2022 · N423AS · Boeing 737990ER · Engine Cranking
  > FOUND STARTER MAGNETIC PLUG BROKEN ON #1 ENG. GROUNDED - YES. REMOVED AND REPLACED #1 ENG STARTER PLUG PER B737-900 AMM 80-11-01. LEAK CHECK GOOD.
- [SDR ASAA2022041037937](https://openairdocs.org/sdr/ASAA2022041037937.md): Harness · faulty · Apr 10, 2022 · N423AS · Boeing 737990ER · APU Oil System
  > FOLLOW UP TROUBLESHOOTING FOR REPETITIVE APU AUTO SHUTDOWNS WITH FAULT LIGHT DUE TO OIL TEMP FAULTS. GROUNDED - YES. REMOVED AND REPLACED APU ENGINE WIRE HARNESS REF B737-900 AMM 49-11-01/401. PERFORMED APU OPERATIONAL TEST REF AMM 49-11-00-710-801. OPS CHECK

Next page: https://openairdocs.org/aircraft/N423AS/reports.md?page=2

## 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 = 'N423AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N423AS/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.