# SDR CALA2026022614102

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2026
- Submitted: February 26, 2026
- Operation: Air carrier
- Aircraft: [N27015](https://openairdocs.org/aircraft/N27015), registered now
- Make and model: Boeing 777224
- Aircraft serial: 28678
- Aircraft time: 119,003 hours, 12,224 cycles
- Engine: Ge GE9090B
- System (JASC): [7732 · Engine Vibration Analyzer](https://openairdocs.org/jasc/7732)
- Part: Engine
- Condition: Vibration
- Location: Nr 1
- Stage of operation: CL
- How discovered: O
- Nature of condition: E, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026022614102

## Discrepancy

NR 1 ENG VIBRATION INDICATION.  VIBRATION HIT 5.5. VIBRATION NOTED THROUGH AIRFRAME BY AIRCREW, SUGGESTS NOT AN INDICATION ISSUE. PERFORMED TEST NR 12A, LOW PRESSURE SYSTEM TRIM BALANCE OF NR 1 ENGINE REF 71-00-00-700-812-G00 AND CHANGED FAN BALANCE WEIGHTS.  NEW CONFIGURATION IS P08 AT HOLE 37, P08 AT 36, P04 AT 35, P02 AT 6, & ALL REMAINING WEIGHTS P01. NEW CONFIGURATION SAVED TO AVM. PERFORMED TEST NR 10 LOW PRESSURE SYSTEM VIBRATION SURVEY OF NR 1 ENG IAW AMM 71-00-00-700-810-G00. VIBRATION NOW WITHIN LIMITS WITH MAX PEAK OF 0.6 UNITS AT 80% N1. E1 FAN BALANCE WEIGHT CORRECTION: CURRENT CONFIGURATION IS P08 AT HOLE 37, P08 AT 36, P08 AT 11, P02 AT 6, & ALL REMAINING WEIGHTS P01 IAW AMM 71-00-00-700-812-G00.

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