# SDR QXEA2026101300194

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 11, 2026
- Submitted: October 14, 2026
- Operation: Air carrier
- Aircraft: [N648QX](https://openairdocs.org/aircraft/N648QX), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000789
- Aircraft time: 19,618 hours, 13,959 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Box
- Part number: CDSP4652505
- Condition: Malfunctioned
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QXEA2026101300194

## Discrepancy

FLIGHT 9987. FA 2 DISPENCING UNIT IN FWD GALLEY IS INOP. FLIGHT ATTENDANT O2 DISPENCING UNIT IN FWD LAVIS INOP. PLACED ON MEL. MEL'S CLEARED.  T/S FWD G1 GALLEY O2 BOX INOP. OXYGEN BOX WILL NOT OPEN DURING PAX OXYGEN SYS OPS TEST IAW AMM 35-20-00-710-801-A,  BEGAN TO PERFORM ELECTRICAL POWER CHECK ON CONNECTOR P0362 REF WM 35-21-50. IAW SWPM 20-64-00. FOUND PIN V ON P0362 READS OL TO GROUND – FAULT (~ 0 OHMS EXPECTED). FOUND W102-01748-20N TO BE PULLED OUT OF TERMINAL LUG GS0938. RE-TERMINATED GS0938 ON W102-01748-20N. IAW SWPM 20-41-10, SWPM 20-21-10, AMM 20-13-21-910-801-A & AMM 20-13-21-910-803-A. PIN V ON P0362 NOW READS 0 OHMS TO GROUND GOOD. REMOVED FWD LAV O2 BOX IAW AMM 35-20-05-000-801-A. CHK FOR 28 VDC BETWEEN LAV O2 BOX SPLICE LV2-TJ1 INTERCONNECTS ERJ-LV504-22 & ERJ-LV505-22N WHILE PERFORMING OPS TEST OF THE PASSENGER OXYGEN SYSTEM IAW E175 AMM 35-20-00-710-801-A, WM 25-41-51-1 AND SWPM 20-64-00: 28 VDC NOTED BETWEEN INTERCONNECTS DURING TEST – GOOD. HOWEVER, NOTED THAT ERJ-LV504-22 AND ERJ-LV505-22N FOUND TO BE CONNECTED TO SPLICE LV2-TJ1 INCORRECTLY. IAW E175 WM 25-41-51-1 MOVED INTERCONNECTS TO CORRECT CONNECTIONS. ERJ-LV504-22 TO PIN A AND ERJ-LV505-22N TO PIN B IN SPLICE LV2-TJ1.  PERFORMED PASSENGER OXYGEN SYSTEM OPS TEST. IAW E175 AMM 35-20-00-710-801-A. FWD LAV O2 BOX NOW OPERATES AS NORMAL. RETURNED TO SERVICE.

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