# Service difficulty reports: N686UA

A list on [N686UA](https://openairdocs.org/aircraft/N686UA.md).

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

- [SDR CALA2026101920447](https://openairdocs.org/sdr/CALA2026101920447.md): Light · intermittent · Oct 15, 2026 · N686UA · Boeing 7673CB · Lighting System
  > ELECTRICAL BURNING ODOR AROUND ROW 15C. RAN SMOKE FIRE FUMES CHECKLIST. ODOR PERSISTED. CONDITIONAL INSPECTION (EC0500-01055A) IAW 05-51-56/201 AND AMM 05-51-56-940-801-C1. LT & RT RECIRC FAN FILTERS REPLACED IAW AMM 21-25-02-004-001-002 & 21-25-02-404-008-00
- [SDR CALA2026083119059](https://openairdocs.org/sdr/CALA2026083119059.md): Engine · failed · Aug 20, 2026 · N686UA · Boeing 767300 · Engine (Turbine/Turboprop)
  > LEFT ENGINE FAILED DURING CLIMB, ENG1 SN. (TSI=, CSI= CYC). CREW REPORTED THAT ENG1 WAS SHUTDOWN DUE TO THICK SMOKE IN THE CABIN (L/P 3038084). OIL PRESS IN RED WHILE IN IDLE. EGT 715, FLIGHT ATTENDANTS REPORTED THAT LEFT ENG WAS SHAKING VIOLENTLY ON THE WIN
- [SDR 2026FA0000657](https://openairdocs.org/sdr/2026FA0000657.md): Oil System · faulted · Aug 20, 2026 · N686UA · Boeing 7673CB · Turbine Engine Oil System
  > HAD AN AIR RETURN FLIGHT, IN GENEVA, WITH CUSTOMER UNITED. THE AIRCRAFT FLIGHT NUMBER UA957. AIRCRAFT EXPERIENCED AN ABNORMAL INCREASE IN ENGINE 1 OIL PRESSURE, ACCOMPANIED BY ABNORMAL ENGINE NOISE, A BURNING ODOR, & SMOKE IN THE CABIN. THE FLIGHT CREW SUBSEQ
- [SDR CALA2026080918414](https://openairdocs.org/sdr/CALA2026080918414.md): Hinge Pin · out of position · Aug 7, 2026 · N686UA · Boeing 7673CB · Emergency Exits
  > F/A REPORTED PAX AT OVERWING EMERGENCY ESCAPE HATCH SEATS 20BA, EXPERIENCED NOISE & VIBRATIONS COMING FROM THE FLOOR AREA. LASTED FOR 15 MINS & ABRUPTLY STOPPED. FLT CREW MISINTERPRETED REPORT LOCATION AS AROUND THE LT ENG AREA. PERFORMED EXTERIOR GVI OF LT
- [SDR CALA2026060816913](https://openairdocs.org/sdr/CALA2026060816913.md): Oxygen Mask · leaking · Jun 5, 2026 · N686UA · Boeing 7673CB · Crew Oxygen System
  > CREW OXYGEN PRESSURE LEAKING DURING FLIGHT FROM O2 MASK BEHIND C A ON ARRIVAL CREW NOTED; OXYGEN LEVEL AT 1620 PSI ON DEPARTURE. BY ARRIVAL CREW O2 DEPLETED TO 1460 PSI. CAPT NOTICED O2 MASK BEHIND (CAPT SEAT) LEAKED. PERFORMED GVI OF AFT (LH) STOWAGE BOX PER
- [SDR CALA2026060516848](https://openairdocs.org/sdr/CALA2026060516848.md): Probe · faulty · Jun 2, 2026 · N686UA · Boeing 7673CB · Fuel Quantity Indicator
  > FUEL CONFIG LIGHT CAME ON BELOW 1000 FT. RAN CK LST. THEN RT TNK FUEL WENT UP BY 1700 LBS PERFORMED FQIS BITE TEST PER FIM 28-41 TASK 848, FOUND MESSAGE "RM COMPENSATOR CONTAMINATED A01" ON LAST LEG IN FAULT HISTORY., PERFORMED WIRING CHECK FROM FUEL QTY PRO
- [SDR CALA2026060116709](https://openairdocs.org/sdr/CALA2026060116709.md): Lens · damaged · May 30, 2026 · N686UA · Boeing 7673CB · Emergency Lighting
  > AFT EXT OVERWING SLIDE EMER LIGHT ON LT AND RT SIDE OF AC WILL NOT ILLUMINATE, RELAMPED LH SIDE EMG LIGHT, OPS CHECK GOOD. RH EMG LIGHT LENSE COVER DAMAGED AND SREWS STRIPPED DURING REMOVAL. WAITING ON NEW PARTS FOR RH SIDE. CORRECTION RH EXT EMG AFT SLIDE L
- [SDR CALA2026052816603](https://openairdocs.org/sdr/CALA2026052816603.md): Densitometer · faulted · May 25, 2026 · N686UA · Boeing 7673CB · Fuel Quantity Indicator
  > RT FUEL GAUGE FREEZES INTERMITTANTLY CAUSING A FUEL CONFIG LIGHT. CROSSFEED DOES NOT MOVE GAUGE. PERFORMED FUEL QTY BITE IAW FIM 28-41 FAULT TREE 847 FOUND NO PRESENT FAULTS. FOUND FAULT IN HISTORY LEG 00 LM DENS SENS OPEN AT PROC A03. LEG 01 LM DENS SEN
- [SDR CALA2026040115003](https://openairdocs.org/sdr/CALA2026040115003.md): Light · inoperative · Mar 31, 2026 · N686UA · Boeing 7673CB · Emergency Lighting
  > EMERGENCY LIGHT AT 12L FOUND INOPERATIVE. EMERGENCY LIGHT ASSY REPLACED IAW AMM TASK 33-51-00-432-006. OPS CHECK GOOD.
- [SDR CALA2026040115001](https://openairdocs.org/sdr/CALA2026040115001.md): Bulb · no test · Mar 31, 2026 · N686UA · Boeing 7673CB · Emergency Lighting
  > EMERGENCY LIGHTS - OPERATIONAL TEST WITH THE TEST SWITCHES EMERGENCY LIGHT L/H FUSELAGE AFT OF WING TO BODY FAIRING U/S. FILAMENT FOUND NOT SEATED CORRECTLY IN CONNECTOR. FILAMENT ADJUSTED NOW FUNCTION SATIS. WORK CARRIED OUT IAW AMM 33-51-06
- [SDR CALA2026030614385](https://openairdocs.org/sdr/CALA2026030614385.md): Fuel Cap · missing · Mar 3, 2026 · N686UA · Boeing 7673CB · Fuel Storage
  > FUELER REPORTED BOTH FUEL CAPS MISSING. INSPECTION CARRIED OUT IAW AMM 05-51-59-202-001. NO DEFECTS.
- [SDR CALA2025111311174](https://openairdocs.org/sdr/CALA2025111311174.md): Door · lack of lube · Nov 11, 2025 · N686UA · Boeing 7673CB · Passenger/Crew Doors
  > DOOR 1L HARD TO ARM EGLL TECH THINKS THE ASSEMBLY NEEDS TO BE LUBED. ACCOMPLISHED FIM TASK 52-11 FAULT TREE 804. OPERATED DOOR SLIDE ARM AND DISARM MULTIPLE TIMES, OPS CHECK GOOD AT THIS TIME REF AMM 52-11-00 ADD EMP:U406884
- [SDR CALA2025111011102](https://openairdocs.org/sdr/CALA2025111011102.md): Wire · chafed · Nov 6, 2025 · N686UA · Boeing 7673CB · Equipment/Furnishings Wiring
  > DURING INSPECTION OF FWD GALLEY CHILLER, MULTIPLE AREAS OF DAMAGED & BURNT WIRING FOUND IN VICINITY OF FWD GALLEY CHILLER. ONE ITEM RAISED FOR WIRE DAMAGE TO W0264-230-08. REMAINDER OF DAMAGED WIRES TO BE IDENTIFIED AND RAISED AS SEPERATE ENTRIES. IDT FLAGG
- [SDR CALA2025111011051](https://openairdocs.org/sdr/CALA2025111011051.md): Oil Filter · misinstalled · Nov 6, 2025 · N686UA · Boeing 7673CB · Turbine Engine Oil System
  > UPON REMOVAL OF NR 2 ENG MAIN OIL FILTER, PROTECTIVE PLASTIC CAPS ON FILTER FEET FOUND NOT REMOVED, AND DISINTGRATED. SOME DEBRIS FOUND IN FILTER. ENGINE FILTER REPLACED ON TASK 63-7921-1-0002. ENGINE IDLE RUN REQUIRED AS STATED BY POWERPLANT. ENGINE GROUND
- [SDR CALA2025102210411](https://openairdocs.org/sdr/CALA2025102210411.md): Lens · missing · Oct 22, 2025 · N686UA · Boeing 7673CB · Emergency Lighting
  > EMERGENCY LIGHTS OPS TEST WITH THE TEST SWITCHES, GALLEY 2, 3X FLOOR PROX LIGHT LENS CAPS MISSING ADJACENT TO STOWAGE 227, 228 & 235. LIGHT IS FULLY FUNCTIONING. FLOOR PROX LIGHT LENS CAPS ADJACENT TO STOWAGE 227, 228 & 235 REPLACED IAW AMM 33-51-10-962-172.
- [SDR CALA2025082708181](https://openairdocs.org/sdr/CALA2025082708181.md): None · no discrepancy · Aug 23, 2025 · N686UA · Boeing 767322 · Standard Practices/Structures
  > DOOR 2L SLIDE PRESSURE GAUGE APPEARS TO BE IN THE RED VERIFIED DOOR 2L DOOR SLIDE PRESSURE GAUGE IS WITHIN LIMITS PER AMM 25-66-01. OK TO CONTINUE.
- [SDR CALA2025062605882](https://openairdocs.org/sdr/CALA2025062605882.md): Door · no discrepancy · Jun 24, 2025 · N686UA · Boeing 7673CB · Service Doors
  > DOOR 2R PRESSURE GAUGE IS INDICATING IN THE RED ZONE. DOOR 2R SLIDE PRESSURE GAUGE WITHIN THE GREEN BAND. NON-FURTHER MAINTENANCE ACTION REQUIRED
- [SDR CALA2025051404676](https://openairdocs.org/sdr/CALA2025051404676.md): Skin · damaged · May 15, 2025 · N686UA · Boeing 7673CB · Elevator, Plate/Skin
  > LH O/B ELEVATOR UPR SURFACE MID AREA STA175.98-200.46 FND HOLE REF HX NR WO.4760910,
- [SDR CALA2025021000326](https://openairdocs.org/sdr/CALA2025021000326.md): Lamp · no test · Feb 9, 2025 · N686UA · Boeing 7673CB · Emergency Lighting
  > EMERGENCY LIGHTS OPERATIONAL CHECK {B767-33-3-7000} - RH FUSELAGE SLIDE EMERGENCY LIGHTS 2EACH INOP RELAMPED BOTH EXTERNAL SLIDE EMERGENCY LIGHTS AND OPS CHECKED, ALL GOOD IAW AMM TASK 33-51-06-902-082.
- [SDR CALA2024102300912](https://openairdocs.org/sdr/CALA2024102300912.md): Battery · faulted · Oct 21, 2024 · N686UA · Boeing 7673CB · Emergency Equipment
  > DETACHABLE EMERGENCY EQUIPMENT INSPECTION {B767-25-3-7017} - EMERGENCY FLASH LIGHT AT FLIGHT ATTENDANTS SEAT OPPOSITE GALLEY 9 NOT CHARGING. EMERGENCY FLASHLIGHT AT FLIGHT ATTENDANTS SEAT OPPOSITE GALLEY 9 BATTERY REPLACED IAW AMM 25-60-00. OPERATIONAL TEST CA
- [SDR CALA2024102300908](https://openairdocs.org/sdr/CALA2024102300908.md): Charger · faulted · Oct 21, 2024 · N686UA · Boeing 7673CB · Emergency Lighting
  > EMERGENCY LIGHTS OPERATIONAL CHECK {B767-33-3-7000} - CENTER AISLE UPTO SEAT 7 RH & LH EMERGENCY AISLE LIGHTS FOUND INOP. WRT WDM 33-51-15-1A SH 1 SUSPECT EMERGENCY POWER SUPPLY M9043 AT FAULT. CEILING PANEL ABOVE 5L REMOVED. M9043 EPWR SUPPLY TEST BUTTON PRES
- [SDR CALA2024012300185](https://openairdocs.org/sdr/CALA2024012300185.md): Lamp · no test · Jan 21, 2024 · N686UA · Boeing 7673CB · Emergency Lighting
  > EMERGENCY LIGHTS OPERATIONAL CHECK, L/H AFT DOOR SLIDE GROUND ILLUMINATION LIGHT FOUND INOP. LH AFT EMERGENCY DOOR SLIDE LAMP REPLACED AS PER AMM 33-51-06-902-082. ALL OPERATIONS APPEAR CORRECT. ACCOMPLISHED IDT INSPECTION OF LH AFT EMERGENCY DOOR SLIDE LA
- [SDR CALA2023081102491](https://openairdocs.org/sdr/CALA2023081102491.md): Brake Assy · disengaged · Aug 10, 2023 · N686UA · Boeing 767324 · Brake Anti-Skid Section
  > NO6 BRAKE FOUND DESINTEGRATED ON ARRIVAL LHR. BRAKE PISTON STATOR MISSING, CARBON ROTOR FOUND WORN INDICATING STATOR MISSING FOR SOME TIME 32-46-01-004-011. TASK 32-11-20-404-011-004. BRAKE ROD INSTALLATION TO BE INSPECTED UNDER IDT REF GMM 09-10-05. 1 (10). P
- [SDR CALA2022110903083](https://openairdocs.org/sdr/CALA2022110903083.md): Brake · faulted · Nov 8, 2022 · N686UA · Boeing 7673CB · Landing Gear Brake System
  > AFTER PARKING AND CONFIRMED BRAKES SET.AIRCRAFT STARTED TO ROL L BACKWARDS. APPLIED. / CARRIED OUT PARKING BRAKE SYS OPERATIONAL TEST IAW AMM32-44-00-730-801 AND CONFIRMED CORRECT OPERATION AND INDICATIONS OF THE PARKING BRAKE SYS.
- [SDR CALA2022051601241](https://openairdocs.org/sdr/CALA2022051601241.md): Stiffener · cracked · May 13, 2022 · N686UA · Boeing 767300 · Fuselage Structure (General)
  > SUPPORT TASK: EA 5310-07143 REV D OP 001 (AD 2017-17-16) LH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 BETWEEN WL 159 TO 185 FOUND 1EA CRACK AS MARKED TRANSFER REF HXWO 779672 AND ORIGINATED BY EMP V914372 LH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 B
- [SDR CALA2022051601240](https://openairdocs.org/sdr/CALA2022051601240.md): Stiffener · cracked · May 13, 2022 · N686UA · Boeing 767300 · Fuselage Structure (General)
  > SUPPORT TASK: EA 5310-07143 REV D OP 002 (AD 2017-17-16) RH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 BETWEEN WL 159 TO 185 FOUND 1EA CRACK AS MARKED TRANSFER REF HXWO 779691 AND ORIGINATED BY EMP V914372 RH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 B
- [SDR CALA2022051301232](https://openairdocs.org/sdr/CALA2022051301232.md): Stiffener · cracked · May 13, 2022 · N686UA · Boeing 767300 · Fuselage Structure (General)
  > SUPPORT TASK: EA 5310-07143 REV D OP 001 (AD 2017-17-16) LH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 BETWEEN WL 159 TO 185 FOUND 1EA CRACK AS MARKED TRANSFER REF HXWO 779672 AND ORIGINATED BY EMP V914372 LH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 B
- [SDR CALA2022051301231](https://openairdocs.org/sdr/CALA2022051301231.md): Stiffener · cracked · May 13, 2022 · N686UA · Boeing 767300 · Fuselage Main, Structure
  > SUPPORT TASK: EA 5310-07143 REV D OP 002 (AD 2017-17-16) RH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 BETWEEN WL 159 TO 185 FOUND 1EA CRACK AS MARKED TRANSFER REF HXWO 779691 AND ORIGINATED BY EMP V914372 RH NOSE WHEEL WELL VERTICAL STIFFENER ON STA 287 B
- [SDR CALA2021090901536](https://openairdocs.org/sdr/CALA2021090901536.md): Hydraulic System · overserviced · Sep 9, 2021 · N686UA · Boeing 7673CB · Hydraulic System, Main
  > *EMERGENCY DECLARED* CENTER HYD QTY LIGHT ILLUM. QTY AT.47 AFTER TURNING OFF CNTR HY DS QTY HELD AT.51 LOCKED BY TOMC SR MANAGER DUE TO EMERGENCY BEING DECLARED FOR LANDING. UNLOCK FOR UPDATE UPON CREW DEBRIEF, THEY STATED NO LOW PRESSURE LOGHTS WERE ILLUMIN
- [SDR CALA2021082501430](https://openairdocs.org/sdr/CALA2021082501430.md): Quick Disconnect · loose · Aug 25, 2021 · N686UA · Boeing 7673CB · AC Generator-Alternator
  > RIGHT ENGINE DRIVE LIGHT ILLUMINATED AND CREW DISCONNECTED IDG. FOUND #2 ENG IDG LOW OIL QUANTITY MESSAGE ON EICAS STATUS PAGE. FOUND IDG OIL LEAKAGE FROM BOTH QUICK DISCONNECTS SERVICE FITTINGS FOR OVERFLOW DRAIN AND PRESSURE FILL. REPLACED QUICK DISCONNECT F
- [SDR CALA2021072801208](https://openairdocs.org/sdr/CALA2021072801208.md): Fmc · malfunctioned · Jul 28, 2021 · N686UA · Boeing 7673CB · Flight Management Computing Hardware System
  > REJECT T/O FMC LOST ALL TAKEOFF SPEEDS AIRCRAFT DID NOT HAVE ANY EICAS MESSAGE TO FMC. NO CURRENT EICAS MESSAGES. NO 30 DAY HISTORY. BRAKE TEMPS UNDER 4 CONSIDERED NORMAL PER THE AMM. CLASSIFIED AS LOW SPEED ABORT 60 KTS. TAKE OF DATA NOW NORMAL
- [SDR CALA2021062300946](https://openairdocs.org/sdr/CALA2021062300946.md): Relay · faulted · Jun 23, 2021 · N686UA · Boeing 7673CB · Fuel Boost Pump
  > UPON ATTEMPTING TO XFEED FUEL FROM RIGHT TO LEFT WITH BOTH XFEED VALVES OPN L FUEL SYS PRESS DEBRIEFED CREW AND THEY STATED THAT DURING ENGINE CROSSFEED OPER ATION WITH EITHER BOTH BOOST PUMPS SELECTED OFF ON ITS RESPECTIV E SIDE, THEY GET A CAUTION ADVISORY E
- [SDR CALA2019062401064](https://openairdocs.org/sdr/CALA2019062401064.md): Skin · cracked · Jun 20, 2019 · N686UA · Boeing 7673CB · Wing, Plate/Skin
  > RIGHT WING I/B SEGMENT OF L-6.5 2EA FASTENER HOLES FOUND CRACK SKIN INFERIM REPAIRED IAW ECRA 5725-01036 REV ORIG PART 1.

## 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 = 'N686UA' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N686UA/reports

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