For trimming, from where is the trimming data plate specification derived?

For trimming, from where is the trimming data plate specification derived?

• A. The aircraft flight test manual.
• B. The engine warranty sheet.
• C. The data plate specifications obtained when the engine was calibrated in the manufacturer’s test cell.
• D. The pilot's operating handbook.

Answer: (C)

Trimming is based on the engine’s certified performance data. The trimming data plate specification comes from the data plate specifications obtained when the engine was calibrated in the manufacturer’s test cell. That calibration establishes the exact fuel, timing, and operating limits that the engine is certified to meet, and these figures are what the trimming process uses to set the engine correctly. The other sources aren’t used for trimming data: a flight test manual covers test procedures, a warranty sheet isn’t about performance data, and the pilot’s operating handbook provides general aircraft operating limits rather than engine-specific trimming values.

Trimming is based on the engine’s certified performance data. The trimming data plate specification comes from the data plate specifications obtained when the engine was calibrated in the manufacturer’s test cell. That calibration establishes the exact fuel, timing, and operating limits that the engine is certified to meet, and these figures are what the trimming process uses to set the engine correctly.

The other sources aren’t used for trimming data: a flight test manual covers test procedures, a warranty sheet isn’t about performance data, and the pilot’s operating handbook provides general aircraft operating limits rather than engine-specific trimming values.