# SDR ASAA2019102931182

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 2019
- Submitted: November 5, 2019
- Operation: Air carrier
- Aircraft: [N448AS](https://openairdocs.org/aircraft/N448AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36356
- Aircraft time: 14,331 hours, 4,628 cycles
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Bleed Valve
- Part number: 1821M60P04
- Part serial: GRT18264
- Condition: Leaking
- Location: Nr 2 Engine
- Part time: 14,374 hours, 4,639 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019102931182

## Discrepancy

DURING PDC DURING AROUND, FOUND #2 ENG TBV DRAIN LINE LEAK WITH 1 DROP PER MINUTE. GROUNDED - YES. REMOVED AND REPLACED #2 TBV PER B737-900 AMM 75-23-01-400-801-F00. PERFORMED TEST LISTED. NO LEAKS FOUND. NO DEFECTS NOTED.

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