# Service difficulty reports: N474AS

A list on [N474AS](https://openairdocs.org/aircraft/N474AS.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 5 · 244 reports

- [SDR ASAA2026092068844](https://openairdocs.org/sdr/ASAA2026092068844.md): Power Supply · inoperative · Sep 20, 2026 · N474AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHTS AT ROW 9 DEF AND 13 DEF NOT ILLUMINATED. GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE EMERG LIGHTS POWER SUPPLY AND BATTERY PACK S/N 122749 ROW 7 DEF, OP CHECKS GOOD. IAW B737-900 AMM 33-51-06-960-805 STEP 4. E. 5, & 6.D AND 33-51-06-960-
- [SDR ASAA2026081568666](https://openairdocs.org/sdr/ASAA2026081568666.md): Support · corroded · Aug 15, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT LBL 20 STA 947 TO 967 CORRODED. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT INTERCOSTAL IAW BOEING 737-900ER S
- [SDR ASAA2026081468793](https://openairdocs.org/sdr/ASAA2026081468793.md): Floorbeam · corroded · Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage Main, Floor Beam
  > UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND CORROSION ON BS 947 FLOORBEAM UPPER CAP AT ALL 4 LAV MOUNT FITTING LOCATIONS. GROUNDED - YES. REPAIRED FLOORBEAM 947.5 LBL-59-RBL-59 IAW SRM 53-70-51-2R-5 REPAIR 5, EA 900ER-53EA-30665.
- [SDR ASAA2026081468792](https://openairdocs.org/sdr/ASAA2026081468792.md): Sill Drain · corroded · Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage Main, Structure
  > R2 MOPSILL HAS MULTIPLE AREAS OF CORROSION. GROUNDED - YES. REMOVED & REPLACED R2 MOP SILL CHORD IAW BOEING SRM 51-40-02.
- [SDR ASAA2026081468665](https://openairdocs.org/sdr/ASAA2026081468665.md): Mount · corroded · Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach Fittings
  > UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT RBL 20 BETWEEN STA 947 AND 967 TO BE CORRODED WHERE MOUNT SITS. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT IN
- [SDR ASAA2026081468664](https://openairdocs.org/sdr/ASAA2026081468664.md): Mount · corroded · Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach Fittings
  > UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND INTERCOSTAL RBL50 BETWEEN STA 927 AND 947 TO BE CORRODED WHERE MOUNT SITS. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT INT
- [SDR ASAA2026081468663](https://openairdocs.org/sdr/ASAA2026081468663.md): Mount · corroded · Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach Fittings
  > UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT LBL 50 BETWEEN BS 947 & 967 TO BE CORRODED WHERE MOUNT ATTACHES. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT I
- [SDR ASAA2026081468609](https://openairdocs.org/sdr/ASAA2026081468609.md): Mount · corroded · Aug 14, 2026 · N474AS · Boeing 737990ER · Fuselage, Equipment Attach Fittings
  > UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT RBL50 BETWEEN STA 947 AND 967 TO BE CORRODED WHERE MOUNT ATTACHES. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1 REMOVED & REPLACED LAV MOUNT SUPPORT
- [SDR ASAA2026081368735](https://openairdocs.org/sdr/ASAA2026081368735.md): Attach Angle · corroded · Aug 13, 2026 · N474AS · Boeing 737990ER · Fuselage Main, Attach Fittings
  > AFT PIT FWD SHIELD ATTACH ANGLES 2 EA ARE CORRODED. GROUNDED - YES. REMOVED & REPLACED 2 EA AFT PIT FWD SHIELD ATTACH ANGLES IAW SRM 51-40-02-0G-0 STEP 4, 5, 7.
- [SDR ASAA2026080568790](https://openairdocs.org/sdr/ASAA2026080568790.md): Transition Panel · corroded · Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO PIT RT TRANSITION HAS MULTIPLE SPOTS OF CORROSION AT BS 727-767. GROUNDED - YES. REMOVED DAMAGE, FOUND TO BE OUT OF LIMITS, REPAIRED RT TRANSITION FROM STA 727-767 IAW SRM 53-00-53-2R-5.
- [SDR ASAA2026080568736](https://openairdocs.org/sdr/ASAA2026080568736.md): Transition Panel · corroded · Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO PIT LEFT TRANSITION AT STA 500 TO 500L HAS CORROSION. GROUNDED - YES. REPAIRED FWD CARGO PIT RT TRANSITION STA 500H+9 TO 500L IAW SRM 53-00-53-2R-5, REMOVED DAMAGE AT STA 500 TO 500H FOUND TO BE WITH IN LIMITS IAW SRM 53-00-53-1A-2.
- [SDR ASAA2026080568718](https://openairdocs.org/sdr/ASAA2026080568718.md): Transition Panel · corroded · Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO BAY, LT TRANSITION HAS MULTIPLE SPOTS OF CORROSION AT BS 727 - 847. GROUNDED - YES. REMOVED CORROSION, FOUND OUT OF LIMITS, REPAIRED IAW SRM 53-00-53-2R-5 W= 1.5" O= 0040:. R= 0.032" L= 2" D= 0.008.
- [SDR ASAA2026080568607](https://openairdocs.org/sdr/ASAA2026080568607.md): Baffle · cracked · Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO PIT LT AT BS 500K FWD SIDE BAFFLE CLIP CRACKED. GROUNDED - YES. REMOVED AND INSTALLED NEW CILP ON FWD CARGO COMPT LH SIDE STA 500K IAW B737-900 SRM 51-40-02-0G-0.
- [SDR ASAA2026080568498](https://openairdocs.org/sdr/ASAA2026080568498.md): Transition Panel · corroded · Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO PIT RT TRANSITION AT STA 500E TO 500L HAS CORROSION. GROUNDED - YES. REPAIRED FWD CARGO PIT RT TRANSITION BS 500+9 TO 500L IAW B737-900ER SRM 53-00-53-2R-5.
- [SDR ASAA2026080568336](https://openairdocs.org/sdr/ASAA2026080568336.md): Shield · corroded · Aug 5, 2026 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > AFT CARGO FWD SHIELD HAS CORROSION. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING SRM 53-60-15-1A-1 STEP 4G(2), REMOVED & REPLACED SHIELD IAW SRM 51-40-02-0G-0 STEP 4,
- [SDR ASAA2025080559947](https://openairdocs.org/sdr/ASAA2025080559947.md): Brake Pads · damaged · Aug 5, 2025 · N474AS · Boeing 737990ER · Landing Gear Brake System
  > ON TAKEOFF ROLL EXTREMELY STRONG VIBRATION FELT AT APPROX 60 KNOTS, TAKEOFF ABORTED. GROUNDED - YES. INSPECTED ALL 4 ANTI-SKID TRANSDUCERS, NO DEFECT NOTED. ACCOMP TRANSDUCER OPS TEST IAW AMM 32-42-00. ALL 4 GEAR TESTS PASSED. FOUND DAMAGE TO NR 1 BRAKE ON
- [SDR ASAA2024100153408](https://openairdocs.org/sdr/ASAA2024100153408.md): Battery · inoperative · Oct 1, 2024 · N474AS · Boeing 737990ER · Emergency Lighting
  > FLIGHT DECK EMERGENCY DOME LIGHT INOP GROUNDED - YES. REPLACED EMERGENCY WITH SERVICEABLE LIGHTS BATTERY AND FUSE. OP CHECKS GOOD IAW B737-900 AMM 33-51-06-960-804
- [SDR ASAA2024093052909](https://openairdocs.org/sdr/ASAA2024093052909.md): Power Supply · inoperative · Sep 30, 2024 · N474AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY LIGHT ABOVE BIN AT ROW 27CBA DOES NOT WORK. GROUNDED - YES. REMOVED & REPLACED EMERGENCY LIGHT BATTERY PACK IAW B737-900 AMM 33-51-06-960-805 OPS CK GOOD. (S/N 402955)
- [SDR ASAA2024091052648](https://openairdocs.org/sdr/ASAA2024091052648.md): Transition Panel · corroded · Sep 10, 2024 · N474AS · Boeing 737990ER · Fuselage Miscellaneous Structure
  > FWD CARGO R/H TRANSITION STA 500D TO 500I HAS AREAS OF CORROSION. GROUNDED - YES. REMOVED DAMAGE WITH SURFACE BLEND FOUND TO BE OUT OF LIMITS AND REPAIRED R/H TRANSITION IAW B737-900ER SRM 53-00-53-2R-5W 1 O.040 R.020 L 1 D.020.
- [SDR ASAA2024090553403](https://openairdocs.org/sdr/ASAA2024090553403.md): Battery · inoperative · Sep 5, 2024 · N474AS · Boeing 737990ER · Emergency Lighting
  > EXIT ROW LIGHTS AT ROW, 25 AND 29 INOP. (FCF INDUCTION FLIGHT DISCREPANCY ITEM #15) GROUNDED - YES. REMOVED AND INSTALLED SERVICEABLE EMERGENCY BATTERY, OPS CK GOOD IAW B737-900 AMM 33-51-06-960-805. (S/N 403945)
- [SDR ASAA2024062850659](https://openairdocs.org/sdr/ASAA2024062850659.md): Battery Pack · discharged · Jun 28, 2024 · N474AS · Boeing 737990ER · Emergency Lighting
  > R1 AND RH AFT CABIN EMERGENCY LIGHTS NEEDS FULL CHARGE AND OPS CHECK AFTER 90 MINUTES. GROUNDED - YES. PERFORMED OPS CHECK OF THE R1 DOOR EMERGENCY LIGHTS AND THE AFT CABIN EMER. LIGHTS PER AMM 33-51-00. OPS CHECK GOOD. NO DEFECTS NOTED AT THIS TIME.
- [SDR ASAA2024062850658](https://openairdocs.org/sdr/ASAA2024062850658.md): Charger · failed · Jun 28, 2024 · N474AS · Boeing 737990ER · Emergency Lighting
  > LH OVERDOOR EXIT SIGN NOT TURN ON DURING EMERGENCY LIGHTS OPERATIONAL CHECK TASK CARD 78233008. ALSO LH FWD MID AND LH AFT MID CABIN EMERGENCY LIGHT DO NOT TURN ON. GROUNDED - YES. REPLACED LH MID OVERWING POWER SUPPLY (CHARGER ASSY) AND BATTERY PACK IAW 33-51
- [SDR ASAA2024030848328](https://openairdocs.org/sdr/ASAA2024030848328.md): Filter · contaminated · Mar 8, 2024 · N474AS · Boeing 737990ER · Air Distribution System
  > CLIMBING THROUGH 6000' FA'S CALLED TO REPORT FUMES ON CABIN AND FEELING LIGHT HEADACHE. FO SAID HE NOTICED ODOR CLIMBING THROUGH 3000' FOR ABOUT 15 SECONDS THAT QUICKLY DISSIPATED. A/C HAD BEEN DEICED AT GATE PRIOR TO CREW ARRIVAL. FO NOTED PUDDLE OF DEICE FLU
- [SDR ASAA2023121746793](https://openairdocs.org/sdr/ASAA2023121746793.md): Battery Pack · no test · Dec 17, 2023 · N474AS · Boeing 737990ER · Emergency Lighting
  > PERFORMING T/C 78233001, FOUND AFT GALLEY L/H OVHD EMERGENCY BATT PACK (M1673) + AFT GALLEY R/H OVHD EMERGENCY BATT PACK (M1672) FAILED BATT CAPACITY CHECK. GROUNDED - YES. REMOVED + REPLACED R/H OVHD EMERGENCY LIGHT BATTERY PACK + L/H OVHD EMERGECNY LIGHT BAT
- [SDR ASAA2023103045928](https://openairdocs.org/sdr/ASAA2023103045928.md): Unknown · unknown · Oct 30, 2023 · N474AS · Boeing 737990ER · Engine Temperature Indicating System
  > WHILE PERFORMING TASK CARD 78273000, FOUND FAULT CODE 77-20871 THE TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE. ECONOMIC FAULT #1 ENG. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023102845894](https://openairdocs.org/sdr/ASAA2023102845894.md): Unknown · unknown · Oct 28, 2023 · N474AS · Boeing 737990ER · HF Communications System
  > SAT COMM MISSING ON MCDU MENU PAGE. GROUNDED - YES. RESET PER QRH SATCOM LOCK UP PROCEDURE SUCCESSFULLY.
- [SDR ASAA2023101645704](https://openairdocs.org/sdr/ASAA2023101645704.md): Unknown · unknown · Oct 16, 2023 · N474AS · Boeing 737990ER · HF Communications System
  > SAT RESET PERFORMED GROUNDED - YES. SAT RESET SUCCESSFUL.
- [SDR ASAA2023100445433](https://openairdocs.org/sdr/ASAA2023100445433.md): Control Panel · malfunctioned · Oct 4, 2023 · N474AS · Boeing 737990ER · Auto Flight System
  > MCP SPEED WINDOW HAD A FEW WHITE DOTS DISPLAYED. GROUNDED - YES. (RESOLVED ON W/O: 1971086 TASKCARD: N/R-00002) REMOVED & REPLACED DFCS MCP REF AMM 22-11-34-400-801, OPS CK NML REF AMM 22-11-34/501 (GP 32), LAND VERIFY TEST (GP 49) REF AMM 22-11-00/201 & HGS
- [SDR ASAA2023100145405](https://openairdocs.org/sdr/ASAA2023100145405.md): Unknown · unknown · Oct 1, 2023 · N474AS · Boeing 737990ER · HF Communications System
  > LOST SAT ON THE MCDU MENU PAGE. GROUNDED - YES. PERFORMED SATCOM LOCK-UP QRH TO RESTORE SAT ON THE MCDU MENU PAGE. VERIFIED SATCOM IS NOT IN THE LOCK-UP STATE REF FIM 23-15 TASK 801. SATCOM LINK TEST SUCCESSFUL REF AMM 23-15-00/501.
- [SDR ASAA2023092745346](https://openairdocs.org/sdr/ASAA2023092745346.md): Unknown · unknown · Sep 27, 2023 · N474AS · Boeing 737990ER · Weather Radar System
  > PWS FAIL FLAG ON ND AFTER PASSING 80 KTS ON T/O ROLL IT DISAPPEARED AROUND 1000 AGL, DID NOT ILLUMINATE AGAIN DURING FLIGHT. GROUNDED - YES. PERFORMED WEATHER RADAR SYSTEM BITE TEST IAW AMM 34-43 TASK 801. SYSTEM TEST SATIS. OK FOR SERVICE.
- [SDR ASAA2023091845208](https://openairdocs.org/sdr/ASAA2023091845208.md): Packing · leaking · Sep 18, 2023 · N474AS · Boeing 737990ER · Turbine Engine Oil System
  > OIL CAP ORING LEAKING ON #2 ENG. GROUNDED - YES. REMOVED AND REPLACED #2 ENG OIL CAP ORING REF AMM 79-11-01-300-801 F00. NO LEAKS NOTED AT THIS TIME.
- [SDR ASAA2023091545155](https://openairdocs.org/sdr/ASAA2023091545155.md): Unknown · unknown · Sep 15, 2023 · N474AS · Boeing 737990ER · Fire Detection
  > ENG #1 LOOP A INOP. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023091145056](https://openairdocs.org/sdr/ASAA2023091145056.md): Unknown · unknown · Sep 11, 2023 · N474AS · Boeing 737990ER · Detection System
  > #2 ENG FIRE LOOP B SHOWS FAULT DURING TEST, A LOOP TESTS FINE. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023090744993](https://openairdocs.org/sdr/ASAA2023090744993.md): Unknown · unknown · Sep 7, 2023 · N474AS · Boeing 737990ER · Engine Indicating System
  > WHIE ACCOMPLISHING T/C 78273000 FOUND #1 ENGINE FAULT CODE 77-20871 THE TOP LEFT EGT SIGNAL (T495S4) IS OUT OF RANGE ECONOMIC FAULT. GROUNDED - YES. NO RECENT FAULTS PER T/C 78273000THIS CLEARS PLT 60647194 AND PLT 60647193SEAMC PETER NOTIFIED.
- [SDR ASAA2023083044849](https://openairdocs.org/sdr/ASAA2023083044849.md): Lens · missing · Aug 30, 2023 · N474AS · Boeing 737990ER · Emergency Lighting
  > WHILE PERFORMING T/C 78233008 FOUND MID CABIN CEILING EMERGENCY LIGHT MISSING LENS. GROUNDED - YES. REPLACED LENS PER MM 33-51-03-960-803, OPS GOOD. CLEARS MEL 33-15D, REMOVED PLACARD C/N #30017474. JOE SEAMC NOTIFIED.
- [SDR ASAA2023072944295](https://openairdocs.org/sdr/ASAA2023072944295.md): Unknown · unknown · Jul 29, 2023 · N474AS · Boeing 737990ER · Communications System
  > SATCOM LOCKUP GROUNDED - YES. QRH PROCEDURE PERFORMED. NORMAL OPS RESTORED.
- [SDR ASAA2023071844122](https://openairdocs.org/sdr/ASAA2023071844122.md): Power Supply · inoperative · Jul 18, 2023 · N474AS · Boeing 737990ER · Emergency Lighting
  > EMERGENCY EXIT SIGN LIGHT OUT CENTER AISLE. GROUNDED - YES. REPLACED CENTER AISLE EMERGENCY EXIT LIGHT ASSY PER AMM 33-51-01. OPS CHK FAILED BLONG 07/19/2023 REMOVED AND REPLACED POWER SUPPLY M1695 REF AMM 33-51-06-960-806. 1 C/B OPENED, TAGGED, AND RESET. ALL
- [SDR ASAA2023062743757](https://openairdocs.org/sdr/ASAA2023062743757.md): Unknown · unknown · Jun 27, 2023 · N474AS · Boeing 737990ER · Detection System
  > REF T/C N8420001 ENGINE FIRE DETECTORS/HARNESS INSPECTION, FOUND MW0326 CORE FIRE DETECTION HARNESS BRAIDED COVER GROUNDING BRAID BROKEN/MISSING AT RIGHT CORE FIRE DETECTOR "B" LOOP TERMINAL. GROUNDED - YES. ON DEFERRAL.
- [SDR ASAA2023060543469](https://openairdocs.org/sdr/ASAA2023060543469.md): Spacer · worn · Jun 5, 2023 · N474AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > #2 ENGINE SPACERS WORN BEYOND LIMITS 14. GROUNDED - YES. REPLACED 14 ENGINE SPACERS IAW ASA TC 78472010.
- [SDR ASAA2023060543468](https://openairdocs.org/sdr/ASAA2023060543468.md): Spinner · worn · Jun 5, 2023 · N474AS · Boeing 737990ER · Turbine Engine Air Inlet Section
  > #2 ENGINE CONE PAINT WORN TO LIMITS. GROUNDED - YES. REPLACED #2 ENGINE CONE IAW ASA TC 78472010.
- [SDR ASAA2023060543465](https://openairdocs.org/sdr/ASAA2023060543465.md): Power Supply · inoperative · Jun 5, 2023 · N474AS · Boeing 737990ER · Emergency Lighting
  > DURING EMERGENCY LIGHTS OPS TEST ASA TASK CARD 78233008 4 LIGHTS DID NOT ILLUMINATE COCKPIT DOME LIGHT, FWD ENTRY DOOR OVERHEAD LIGHT ESCAPE SLIDE, AND FLOOR L1 DOOR. GROUNDED - YES. REMOVED AND REPLACED FWD ENTRY EMERGENCY LIGHTS POWER SUPPLY M1675 REF B737-9
- [SDR ASAA2023051243216](https://openairdocs.org/sdr/ASAA2023051243216.md): Unknown · unknown · May 12, 2023 · N474AS · Boeing 737990ER · HF Communications System
  > SATCOM LOCKOUT PROCEDURE USED. GROUNDED - YES. SATCOM RESTORED SUCCESSFULLY.
- [SDR ASAA2023042442985](https://openairdocs.org/sdr/ASAA2023042442985.md): Lubrication Unit · faulty · Apr 24, 2023 · N474AS · Boeing 737990ER · APU Oil System
  > APU FAILED THREE START ATTEMPTS AT FL350 WITH FAULT LIGHT THAT REMAINED ILLUMINATED. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 49-40 TASK 801 STEPS F AND H(1). REPLACED APU LUBE MODULE PER B737-900 AMM 49-91-11. INSTALLATION TEST PASSED. NO LEAKS.
- [SDR ASAA2023041942953](https://openairdocs.org/sdr/ASAA2023041942953.md): Unknown · unknown · Apr 19, 2023 · N474AS · Boeing 737990ER · Flight Management Computing Hardware System
  > FMC STUCK IN BITE MODE. GROUNDED - YES. VERIFIED FAULT FMC CDU STUCK IN APU BITE. CYCLED C/B P6-4 F12. FMC CDU WENT TO NML. ACCOMP. APU FMC BITE NO APU FAULTS & FMC NML OPS. ACCOMP. APU STARTING & OPERATION TEST, TEST PASS REF. B737-900 AMM 49-61-00-700-801, &
- [SDR ASAA2023040742761](https://openairdocs.org/sdr/ASAA2023040742761.md): Unknown · unknown · Apr 7, 2023 · N474AS · Boeing 737990ER · Autopilot System
  > HDG SEL LIGHT ON MCP WILL NOT ILLUMINATE. GROUNDED - YES. CLEANED CONTACTS, LIGHT OPS CKS NML.
- [SDR ASAA2023040442793](https://openairdocs.org/sdr/ASAA2023040442793.md): Actuator · leaking · Apr 4, 2023 · N474AS · Boeing 737990ER · Compressor Bleed Control
  > DURING ENGINE RUN, FOUND LEAK COMING FROM R VSV DRAIN ON #1 ENGINE. GROUNDED - YES. REMOVED AND REPLACED #1 ENGINE RIGHT HAND VSV ACTUATOR REF B737-900 AMM 75-31-01.
- [SDR ASAA2023040442738](https://openairdocs.org/sdr/ASAA2023040442738.md): Pressure Switch · warning light · Apr 4, 2023 · N474AS · Boeing 737990ER · Engine Fuel Indicating System
  > PER ASA T/C 78273000 LONG TIME FAULT ON ENGINE # 1 THE FUEL FILTER SIGNALS DISAGREE. MSG # 73-31071. GROUNDED - YES. REPLACED FUEL PRESSURE DIFFERENTIAL SWITCH REF B737-900 AMM 73-34-01.
- [SDR ASAA2023040342719](https://openairdocs.org/sdr/ASAA2023040342719.md): Pressure Switch · unknown · Apr 3, 2023 · N474AS · Boeing 737990ER · Engine Fuel Indicating System
  > AFTER TAXIING CLEAR OF THE RUNWAY, THE FILTER BYPASS ON THE #1 ENGINE OF THE FUEL PANEL LIGHT CAME ON. WE SHUT DOWN THE ENGINE AND TAXIIED IN NORMALLY. GROUNDED - YES. RUN ENGINE REF. AMM 71-00-00 & FILTER BYPASS LIGHT DID NOT CAME ON. FOUND MX MESSAGE 73-3107
- [SDR ASAA2023032342496](https://openairdocs.org/sdr/ASAA2023032342496.md): Unknown · unknown · Mar 23, 2023 · N474AS · Boeing 737990ER · Fuel Indicating System
  > FUEL QTY 2 CIRCUIT BREAKER POPPED. GROUNDED - YES. RESET C/B AND PERFORMED FQIS BITE TEST PROCEDURES PER B737-900 FIM 28-41 TASK 801. NO DEFECTS NOTED.
- [SDR ASAA2023030642231](https://openairdocs.org/sdr/ASAA2023030642231.md): Unknown · unknown · Mar 6, 2023 · N474AS · Boeing 737990ER · HF Communications System
  > SATCOM LOCK-UP. GROUNDED - YES. ACCOMPLISHED SATCOM RESET PROCEDURE PER QRH SUCCESSFUL.

Next page: https://openairdocs.org/aircraft/N474AS/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 = 'N474AS' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N474AS/reports

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