# Service difficulty reports: N434AS

A list on [N434AS](https://openairdocs.org/aircraft/N434AS.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 4 · 176 reports

- [SDR ASAA2026013064061](https://openairdocs.org/sdr/ASAA2026013064061.md): Door · no discrepancy · Jan 30, 2026 · N434AS · Boeing 737990ER · Passenger/Crew Doors
  > CATERING REPORTS L2 DOOR HARD TO OPEN. GROUNDED - YES. OPENED AND CLOSED THE L2 DOOR 2X REF AMM 52-13-00. OPS NORMAL.
- [SDR ASAA2026012563975](https://openairdocs.org/sdr/ASAA2026012563975.md): Door · malfunctioned · Jan 25, 2026 · N434AS · Boeing 737990ER · Passenger/Crew Doors
  > CREW REPORTED L2 DOOR WILL NOT OPEN. GROUNDED - YES. INITIALLY FOUND DIFFICULT TO OPEN FROM INSIDE & OUTSIDE. DOOR WILL UNLOCK BUT WOULD NOT CLOCK TO ROTATE. ONCE ABLE TO OPEN DOOR INSPECTEDD AND FOUND NO DEFECTS. OPS THE DOOR SEVERAL TIMES. OBSERVED CORREC
- [SDR ASAA2025122363304](https://openairdocs.org/sdr/ASAA2025122363304.md): Seal · detached · Dec 23, 2025 · N434AS · Boeing 737990ER · Service Doors
  > L2 DOOR CATCHING ON SEAL. DOOR WOULD NOT OPEN. GROUNDED - YES. SECURED L2 DOOR INTERIOR SEAL. NOT PRESSURIZATION SEAL WITH NON-FLAMMABLE TAPE TO PREVENT DOOR FROM CATCHING ON SEAL. CHECKED AND RELEASED PER "INT" REF MEL 25-10E. REMOVED AND REPLACED L2 DOOR SEA
- [SDR ASAA2025101361575](https://openairdocs.org/sdr/ASAA2025101361575.md): Battery Pack · inoperative · Oct 13, 2025 · N434AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS FAILED OPS CHECK. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY PPACK M267 IAW B737-900 AMM 33-31-06-960-805 OP CHECKS GOOD IAW B737-900 AMM 33-51-00-710-801.
- [SDR ASAA2025100161416](https://openairdocs.org/sdr/ASAA2025100161416.md): Floorbeam · cracked · Oct 1, 2025 · N434AS · Boeing 737990ER · Fuselage Main, Floor Beam
  > STA 540 RBL 0 PANEL BREAK IS CRACKED. GROUNDED - YES. REMOVED AND REPLACED PANEL BREAK IAW B737-900ER SRM 51-40-02-0G-0.
- [SDR ASAA2025092661317](https://openairdocs.org/sdr/ASAA2025092661317.md): Rail · corroded · Sep 26, 2025 · N434AS · Boeing 737990ER · Fuselage Main, Structure
  > FWD CARGO AFT BULKHEAD R/H SUPPORT CORRODED RBL 30 TO 35 STA 500L. GROUNDED - YES. REMOVED DAMAGE FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-30-08-1A-1. REMVOED AND REPLACED SUPPORT RAIL ON FWD CARGO AFT BULKHEAD RH BTW RBL 30 TO 35 STA 500L IAW B737-900E
- [SDR ASAA2025092261316](https://openairdocs.org/sdr/ASAA2025092261316.md): Floorbeam · cracked · Sep 22, 2025 · N434AS · Boeing 737990ER · Fuselage Main, Floor Beam
  > STA 540, LBL 0 PANEL BREAK IS CRACKED. GROUNDED - YES. REMOVED AND REPLACED PANEL BREAK ON STA 540 LBL 0, IAW B737-900 SRM 51-40-02-0G-0.
- [SDR ASAA2025091961622](https://openairdocs.org/sdr/ASAA2025091961622.md): Baffle · cracked · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO BAFFLE CLIP CRACKED FWD SIDE STA 500K RBL 30. GROUNDED - YES. REMOVED AND REPLACED BAFFLE CLIP IAW B737-900ER SRM 51-40-02-0G-0.
- [SDR ASAA2025091961320](https://openairdocs.org/sdr/ASAA2025091961320.md): Transition Panel · corroded · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Main, Structure
  > AFT CARGO TRANSITION CORRODED STA 787 TO 727B RBL 30. GROUNDED - YES. REMOVED CORROSION TRANSITION FOUND TO BE OUT OF LIITS, REMVOED AND REPLACED TRANSITION IAW B7370900ER SRM 53-00-53-2R-5 W=1" O=.040 R= 0 L= 2" D=.040.
- [SDR ASAA2025091961319](https://openairdocs.org/sdr/ASAA2025091961319.md): Rail · corroded · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Main, Structure
  > FWD CARGO AFT BULKHEAD LOWER SUPPORT CORRODED STA 500L RBL 30 TO LBL 30. GROUNDED - YES. REMOVED CORROSION ON LOWER RAIL FOUND TO BE OUT OF LIMITS, REMOVED AND REPLACED LOWER RAIL SUPPORT ON FWD CARGO AFT BULKHEAD AT STA 500L, RBL30 TO LBL 30 IAW B737-900ER SR
- [SDR ASAA2025091961318](https://openairdocs.org/sdr/ASAA2025091961318.md): Transition Panel · corroded · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO TRANSITION CORRODED STA 787 TO 727B LBL 30. GROUNDED - YES. REMOVED CORROSION TRANSITION FOUND TO BE OUT OF LIMITS, REMOVED AND REPLACED TRANSTITION PANEL IAW B737-900ER SRM 53-00-53-2R-5W= 1" O=.040 L= 2" R= 0 D=.040.
- [SDR ASAA2025091961184](https://openairdocs.org/sdr/ASAA2025091961184.md): Web · corroded · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO SCUFF PLATE WEB CORRODED STA 847 TO 787 RBL 40. GROUNDED - YES. REMOVED CORROSION ON AFT CARGO DOOR SCUFF PLATE WEB AND FOUND TO BE OUT OF LIITS IAW B737-900ER SRM 53-60-15-1A-1 AND REMOVED AND REPLACED IAW B737-900ER SRM 51-40-02-0G-0 W= 2" O=.050"
- [SDR ASAA2025091961183](https://openairdocs.org/sdr/ASAA2025091961183.md): Shield · corroded · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO FWD SHEILD CORRODED STA 787 TO 767 RBL 30. GROUNDED - YES. REMOVED AND REPLACED AFT CARGO FWD SHIELD AT STA 787 TO 767 RBL 30 IAW BOEING 737-900ER SRM 51-40-02-0G-0. W= 1" O=.050" R=.041" L= 1" D=.009".
- [SDR ASAA2025091961112](https://openairdocs.org/sdr/ASAA2025091961112.md): Shield · corroded · Sep 19, 2025 · N434AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO AFT SHIELD CORRODED STA 847 TO 867 RBL 30. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT LIMITS REMOVED AND REPLACED SHIELD IAW B737-900ER SRM 51-40-02-0G-0 & 51-40-05-0G-0W= 2 O= 0.050 R= 0.044 L= 1 D 0.006.
- [SDR ASAA2025091662033](https://openairdocs.org/sdr/ASAA2025091662033.md): Power Supply · inoperative · Sep 16, 2025 · N434AS · Boeing 737990ER · Emergency Lighting
  > FCF INDUCTION FLIGHT DISC 12 - AFTER RIGHT SECTION OF EMERGENCY EXIT LIGHTS INOP ROW 17FED THROUGHJ ROW 29FED. GROUNDED - YES. REMOVED AND REPLACED EMERGENCY BATTERY PACK RIGHT SECTIN AT EXIT LIGHTS ROW 17FED THROUGH 29FED IAW B737-900 AMM 33-51-06-960-805. PE
- [SDR ASAA2025052858311](https://openairdocs.org/sdr/ASAA2025052858311.md): Power Supply · inoperative · May 28, 2025 · N434AS · Boeing 737990ER · Emergency Lighting
  > LH OVERWING & 2 LH MID CABIN AISLE EMERGENCY LIGHTS INOP. GROUNDED - YES. REMOVED + REPLACED L/H SIDE EMERGENCY EXIT POWER SUPPLY BY 10ABC IAW AMM 33-51-06. OPS CHECK GOOD FOR L/H OVERWING & 2 LH MID CABIN AISLE EMERGENCY LIGHTS.
- [SDR ASAA2025020655794](https://openairdocs.org/sdr/ASAA2025020655794.md): Door · binding · Feb 6, 2025 · N434AS · Boeing 737990ER · Passenger/Crew Doors
  > FA'S REPORT L2 DOOR IS DIFFICULT TO OPERATE. GROUNDED - YES. PERFORMED GVI OF DOOR AND SURROUND NO DEFECTS NOTED. COMPLETED AFT ENTRY DOOR SYSTEM TEST AMM 52-13-00-700-805 BOTH OPEN AND CLOSE TORQUES ARE WITHIN LIMITS AND THE DOOR OPERATES SMOOTH, HOLD OPEN LA
- [SDR ASAA2025010755129](https://openairdocs.org/sdr/ASAA2025010755129.md): Battery Pack · discharged · Jan 7, 2025 · N434AS · Boeing 737990ER · Emergency Lighting
  > FOUND AFT F/A EMERGENCY LIGHT SWITCH IN THE "ON" POSITION. GROUNDED - YES. CHARGED BATTERY PACKS REF AMM 33-51-06 FOUND BATTERY PACK M1670 DEAD. REPLACED M1670 BATTERY PACK. EMERGENCY LIGHTS OPS NORMAL REF FIM 33-50 TASK 801.
- [SDR ASAA2023103045917](https://openairdocs.org/sdr/ASAA2023103045917.md): Power Supply · malfunctioned · Oct 30, 2023 · N434AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTING ABOVE ROW 25DEF AND 29DEF FLICKERED ON/OFF DURING FLIGHT. GROUNDED - YES. COULD NOT VERIFY FLICKERING. ALL INTERIOR EMERGENCY LTS STAY ON WHEN SELECTED ON FOR 15+MINS. NOTICED TEST SW ON M2627 EMERGENCY LIGHT BATTERY PACK FOR 25DEF AND 29DEF
- [SDR ASAA2023101945782](https://openairdocs.org/sdr/ASAA2023101945782.md): Unknown · unknown · Oct 19, 2023 · N434AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY AISLE LIGHT ABOVE OVERHEAD BINS AT SEATS 25 AND 29, RIGHT SIDE, ARE FLASHING CONTINUOUSLY. GROUNDED - YES. VERIFIED EMERGENCY LIGHT SECURED CHECK OKAY REF AMM 33-51-03. SEAMC PHILIP NOTIFIED.
- [SDR ASAA2023101945744](https://openairdocs.org/sdr/ASAA2023101945744.md): Unknown · unknown · Oct 19, 2023 · N434AS · Boeing 737990ER · Emergency Lighting
  > ROW 25 + 29 AC RIGHT OVERHD EMGNCY LIGHTS FLASHING INTERMINTTENTLY. GROUNDED - YES. OPS CHECKED EMERGENCY LIGHT SYS AMM 33-51-00-710-801 CHECKED GOOD.
- [SDR ASAA2023092545364](https://openairdocs.org/sdr/ASAA2023092545364.md): Power Supply · inoperative · Sep 25, 2023 · N434AS · Boeing 737990ER · Emergency Lighting
  > BATTERY WON'T HOLD CHARGE AND CHARGER WON'T CHARGE BATTERY GROUNDED - YES. REPLACED POWER SUPPLY S/N 129757.
- [SDR ASAA2023092245311](https://openairdocs.org/sdr/ASAA2023092245311.md): Power Supply · inoperative · Sep 22, 2023 · N434AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS AT L1 DOOR AND INSIDE CABIN NOT WORKING. GROUNDED - YES. REPLACED ALL APPLICABLE EMERGENCY LIGHT POWER SUPPLY OPS CHECK GOOD IAW 737-900 AMM 33-51-06-960-806 AND 33-51-00-720-801.
- [SDR ASAA2023082044668](https://openairdocs.org/sdr/ASAA2023082044668.md): Outflow Valve · noise · Aug 20, 2023 · N434AS · Boeing 737990ER · Pressure Regulator/Outflow Valve
  > ON DESCENT FROM 18,000 TO LANDING, FA'S NOTED L2 DOOR SQUEAL, FA COMMUNICATIONS WERE NOT EFFECTED AND NO AIRCRAFT PRESSURIZATION ISSUES NOTED. GROUNDED - YES. REF EA 900ER-21EA-25825 REV. 01. APPLIED MULTIPLE BEADS OF SEALANT OF RANDOM SIZE AND SHAPE JUST PAST
- [SDR ASAA2023080544505](https://openairdocs.org/sdr/ASAA2023080544505.md): Line · leaking · Aug 5, 2023 · N434AS · Boeing 737990ER · Turbine Engine Oil System
  > #2 ENGINE OIL TREND DATA SHOWS OIL CONSUMPTION TO GREATER THAN EXPECTED.(#PRI2) ENGINE POWER RUN REQUIRED. GROUNDED - YES. (RESOLVED ON W/O: 1964524 TASKCARD: N/R-00003) ACCOMPLISHED STEPS 1-4 OF THIS TSR. FOUND OIL LEAKING FROM AFT SUMP DRAIN LINE, THERE IS
- [SDR ASAA2023080544449](https://openairdocs.org/sdr/ASAA2023080544449.md): Unknown · unknown · Aug 5, 2023 · N434AS · Boeing 737990ER · Fuel Indicating System
  > REFUEL PANEL INDICATORS SHOWING BLANK. GROUNDED - YES. (RESOLVED ON W/O: 1964524 TASKCARD: N/R-00002) COULD NOT DUPLICATE FOUND POWER CONTROL SWITCH TARGET OUT OF LIMIT. ADJUSTED TARGET TO IN LIMIT RANGE AND TESTS GOOD PER AMM 28-21-81-400-801. THIS CLEARS ME
- [SDR ASAA2023072544232](https://openairdocs.org/sdr/ASAA2023072544232.md): Switch · faulty · Jul 25, 2023 · N434AS · Boeing 737990ER · Engine Starting System
  > REF. T/C 78273000 #1 ENG. HAS FAULT MESSAGE 73-303111 " THE START SWITCH SIGNAL AND ARINC BUS DATA DISAGREE" SHORT TIME FAULT. GROUNDED - YES. (RESOLVED ON W/O: 1963379 TASKCARD: N/R-00001) FAULT PRESENT ON EVERY LEG INCLUDING LEG 0, REPLACED #1 START SWITCH
- [SDR ASAA2023072044145](https://openairdocs.org/sdr/ASAA2023072044145.md): Outflow Valve · leaking · Jul 20, 2023 · N434AS · Boeing 737990ER · Pressure Regulator/Outflow Valve
  > WHISTLE OF AIR/SQEALING SOUND COMING FROM L2 DOOR: STARTED AT TAKEOFF & STOPPED AT LANDING. NO ABNORMAL LIGHTS OR INDICATIONS FROM FLIGHT DECK. DIDNT EFFECT A/C PRESSURIZATION OR COMMUNICATIONS. GROUNDED - YES. INSPECTED L2 DOOR SEALS. NO DEFECTS NOTED AT THIS
- [SDR ASAA2023071644075](https://openairdocs.org/sdr/ASAA2023071644075.md): Unknown · unknown · Jul 16, 2023 · N434AS · Boeing 737990ER · Fuel Indicating System
  > FUELING PANEL HAS NO POWER, CYCLED A/C POWER WITH NO CHANGE. GROUNDED - YES. PERFORMED OP CHECK OF REFUELING PANEL, CHECKED GOOD REF AMM 28-41-01 (C/B WAS RESET PRIOR TO CHECK) ALL INDICATIONS NORMAL AT THIS TIME. REFUELING PANEL AREA LIGHT ALSO WORKS AS NEEDE
- [SDR ASAA2023071544035](https://openairdocs.org/sdr/ASAA2023071544035.md): Unknown · unknown · Jul 15, 2023 · N434AS · Boeing 737990ER · Compressor Bleed Control
  > PER TC 78273000 INTERROGATION OF FMC CDU ENGINE #2 FAULT SHOWS FAULT CODE 75-30452, VBV POSITION SIGNALS DISAGREE ON FLIGHT LEG 3 SHORT TIME FAULT. GROUNDED - YES. (RESOLVED ON W/O: 1961619 TASKCARD: N/R-00001) PERFORMED T/C 78273000 NO FAULT DETECTED IN RECE
- [SDR ASAA2023052943388](https://openairdocs.org/sdr/ASAA2023052943388.md): Guide Vane · nicked · May 29, 2023 · N434AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > FOUND #2 ENG OGV AT 12 O'CLOCK HAS A NICK ON THE LEADING EDGE. GROUNDED - YES. REPLACED #2 ENG OGV AT 12 O'CLOCK POSITION IAW B737-900 AMM 72-23-01.
- [SDR ASAA2023050943188](https://openairdocs.org/sdr/ASAA2023050943188.md): Unknown · unknown · May 9, 2023 · N434AS · Boeing 737990ER · HF Communications System
  > SATCOM LOCK-UP GROUNDED - YES. QRH SATCOM LOCK-UP PROCEDURE PERFORMED.
- [SDR ASAA2023050143126](https://openairdocs.org/sdr/ASAA2023050143126.md): Switch · defective · May 1, 2023 · N434AS · Boeing 737990ER · Communications System
  > HF/SAT XFER SWITCH WILL NOT GO INTO SAT ON HF/SAT #1. GROUNDED - YES. REMOVED & REPLACED HF/SAT TRANSFER PANEL, B737-900 AMM REF 23-15-00/401.
- [SDR ASAA2023031742419](https://openairdocs.org/sdr/ASAA2023031742419.md): Unknown · unknown · Mar 17, 2023 · N434AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > #6 BLADE ON THE #1 ENGINE HAS A KNICK. GROUNDED - YES. ACCOMPLISHED FOD INSPECTION #1 ENGINE REF B737-900 AMM 05-52-00/601 AND ACCOMPLISHED GVI OF THE #1 ENGINE FAN BLADE #6 FOUND NICK OUT OF LIMITS REF B737-900 AMM 72-21-02-200-801-F00 IN AREA "I" OF THE BLAD
- [SDR ASAA2023031242316](https://openairdocs.org/sdr/ASAA2023031242316.md): Charger · arced · Mar 12, 2023 · N434AS · Boeing 737990ER · DC Generating System
  > REF ASA LP 60513046, REF B737-900 AMM 24-31-21 ATTEMPTED REPLACEMENT OF MAIN BATTERY CHARGER(M5) BP FROM SWA, FOUND BURN MARKS ON FLOOR PANEL BELOW AUX BATTERY CHARGER AND DAMAGE TO AUX BATT CHARGER. GROUNDED - YES. REF B737-900 AMM 24-31-31, B737-900 WDM 24-3
- [SDR ASAA2023030942292](https://openairdocs.org/sdr/ASAA2023030942292.md): Battery · faulty · Mar 9, 2023 · N434AS · Boeing 737990ER · DC Generating System
  > AFTER START ELEC LIGHT ILLUMINATED ON OVHD PANEL AND BATTERY DISCHARGE LIGHT ILLUMINATED ON SHUTDOWN. GROUNDED - YES. REMOVED AND REPLACED MAIN BATTERY CHARGER REF B737-900 AMM 24-31-21/401.
- [SDR ASAA2023030742227](https://openairdocs.org/sdr/ASAA2023030742227.md): Panel · none · Mar 7, 2023 · N434AS · Boeing 737990ER · Autopilot System
  > MODE CONTROL PANEL HEADING WINDOW HAS DISTORTION NEAR CENTER OF DISPLAY. GROUNDED - YES. REMOVED AND REPLACED MCP. REF B737-900 AMM 22-11-34
- [SDR ASAA2023022642080](https://openairdocs.org/sdr/ASAA2023022642080.md): Unknown · unknown · Feb 26, 2023 · N434AS · Boeing 737990ER · Flight Management Computing Hardware System
  > LEFT FMC FAILED THAN CAME BACK AFTER A MINUTE. GROUNDED - YES. LEFT FMC RECOVERED, RESET BOTH FMC'S PER B737-900 FIM 34-61 TASK 836NO FAULTS NOTED.
- [SDR ASAA2023010741457](https://openairdocs.org/sdr/ASAA2023010741457.md): Spacer · debonded · Jan 7, 2023 · N434AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING T/C 78472010, #2 ENG FAN LUBE, 6 EA. SPACERS FOUND DISBONDED. GROUNDED - YES. REMOVED & REPLACED SPACERS (6,7,10, 15, 20, & 21) PER T/C 78472010.
- [SDR ASAA2022123141335](https://openairdocs.org/sdr/ASAA2022123141335.md): Window · faulted · Dec 31, 2022 · N434AS · Boeing 737990ER · Windshield/Door Rain/Ice Removal
  > LT SIDE WINDOW OVERHEAT LIGHT CAME ON CYCLED AND CAME BACK ON. GROUNDED - YES. REMOVED AND REPLACED L2 WINDOW REF B737-900 AMM 56-12-11-400-801, OPS AND LEAK CHECK GOOD, REF AMM 30-41-00-710-801 AND 05-51-91-790-801. ORIG SUBMISSON DATE: 1/4/2023
- [SDR ASAA2022122941310](https://openairdocs.org/sdr/ASAA2022122941310.md): Wire · faulted · Dec 29, 2022 · N434AS · Boeing 737990ER · Ice/Rain Protection System Wiring
  > AFTER ROTATION, THE MASTER CAUTION AND L SIDE (L20) WINDOW OVERHEAT ILLUMINATED. WE RAN THE QRH AND THE CAUTION EXTINGUISHED. 30 SECS LATER, CAUTION ILLUMINATED AGAIN & TURNED OFF ASSOCIATED WINDOW HEAT SWITCH AS DIRECTED BY QRH & CONTINUED THE FLIGHT. GROUNDE
- [SDR ASAA2022121041100](https://openairdocs.org/sdr/ASAA2022121041100.md): Spacer · worn · Dec 10, 2022 · N434AS · Boeing 737990ER · Turbine Engine Compressor Section
  > WHILE DOING T/C # 78472010 FAN BLADE LUBE. FOUND #1 ENG SPACERS AT #12,17,18,20,21,23, AND 24 POSITION WORN. GROUNDED - YES. REMOVED AND REPLACED #1 ENG SPACERS AT #12,17,18,20,21,23 AND 24 POSITION PER TASKCARD 78472010.
- [SDR ASAA2022111340755](https://openairdocs.org/sdr/ASAA2022111340755.md): Spacer · debonded · Nov 13, 2022 · N434AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > WHILE ACCOMPLISHING T/C #78472010, FAN BLADE LUBRICATION, FOUND ELASTOMER ON SPACERS # 1,2,4,7,8,9,13,16 AND 19 DISBONDED. REQUIRE REPLACEMENT. GROUNDED - YES. REMOVED AND REPLACED NO. 1 ENG FAN BLADE SPACERS # 1,2,4,7,8,9,13,16 AND 19 REF TASK CARD #78472010.
- [SDR ASAA2022101340311](https://openairdocs.org/sdr/ASAA2022101340311.md): Pressure Panel · faulted · Oct 13, 2022 · N434AS · Boeing 737990ER · Cabin Pressure Control System
  > AUTO FAIL LIGHT ILLUMINATED ON PRESSURIZATION PANEL ALONG WITH ALTN LIGHT, MOVED SELECTOR TO ALTN PER QRH. PRESSURIZATION NORMAL. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2022091039914](https://openairdocs.org/sdr/ASAA2022091039914.md): Flow Sensor · faulty · Sep 10, 2022 · N434AS · Boeing 737990ER · Cabin Cooling System
  > CLIMBING TO FL350 PRESSURE CABIN CLIMB RATE WOULD CLIMB AND DESCEND BACK & FOURTH RAPIDLY TO A RATE OF 500FT TO 2,000 FT PROBLEM SEEMED TO INCREASE WITH FULL POWER CLIMBING TO FL370 AT LOWER ALTITUDES AROUND FL250 RATE WOULD PERIODICALLY CHANGE AT A RATE OF 20
- [SDR ASAA2022090839907](https://openairdocs.org/sdr/ASAA2022090839907.md): Control Valve · failed · Sep 8, 2022 · N434AS · Boeing 737990ER · Cabin Cooling System
  > AT CRUISE FL380, NUMEROUS PRESSURIZATION BUMPS EXPERIENCED OVER 1-2 HOUR PERIOD. CABIN CLIMB INDICATOR WOULD FLUCTUATE BETWEEN 500-700 FPM CLIMB AND 500-1000 FPM DESCENT. CABIN DIFFERENTIAL AT APPROXIMATELY 8.3-8.4 (BOTTOM/BELOW ORANGE ARC), CABIN ALTITUDE APP
- [SDR ASAA2022082139601](https://openairdocs.org/sdr/ASAA2022082139601.md): Control Valve · leaking · Aug 21, 2022 · N434AS · Boeing 737990ER · Cabin Cooling System
  > AT FL350 CABIN RATE OF CLIMB CONSTANTLY CLIMBS / DESCENDS +/- 500 FPM WITH OCCASIONAL SPIKE OF 1700 FPM. N1 STABLE AT 89.2, CABIN DIFF AT 7.8, CABIN ALT 7000FT. DUCT PRESS 45 PSI. NO CHANGE WHEN ALTN SELECTED. CABIN RATE SEEMS TO FOLLOW SLIGHT CHANGE IN RIGHT
- [SDR ASAA2022081139473](https://openairdocs.org/sdr/ASAA2022081139473.md): Software · out of date · Aug 11, 2022 · N434AS · Boeing 737990ER · Flight Management Computing Software System
  > NAV DATA BASE OUT OF DATE. GROUNDED - YES. ACCOMPLISHED ASA TASK CARD N1920483, NAV DATABASE IS NOW CURRENT.
- [SDR ASAA2022080239322](https://openairdocs.org/sdr/ASAA2022080239322.md): Mcu · failed · Aug 2, 2022 · N434AS · Boeing 737990ER · HF Communications System
  > NO SAT PROMPT ON CA SIDE MCDU MENU. APPEARS AS NORMAL ON FO SIDE ALONG WITH ALL SELECTABLE SAT OPTIONS. GROUNDED - YES. PREFORMED SATCOM COMMUNICATION SYSTEM CHECK FOR MCDU ON CA SIDE IAW B737-900 AMM 23-15-00-730-801. TEST PASSED, SAT PROMPT SHOWN ON MCDU (CA
- [SDR ASAA2022062638854](https://openairdocs.org/sdr/ASAA2022062638854.md): Eec · fault message · Jun 26, 2022 · N434AS · Boeing 737990ER · Fuel Controlling System
  > DURING ACCOMPLISHMENT OF T/C78273000 #2 ENG HAS SHORT TIME FAULT MSG 73-21282. THIS IS A 50 FLT HOUR SHORT TIME FAULT. GROUNDED - YES. PERFORMED B737-900 FIM 73-27 TASK 805 PER FIM REPLACED EEC IAW B737-900 AMM 73-21-60-400-801-F00 AND AMM 73-21-60-000-801-F00

Next page: https://openairdocs.org/aircraft/N434AS/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 = 'N434AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N434AS/reports

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