Engine oil temperature transient is 127 °C for 5 minutes under N1 conditions. Which statement best describes this value?

Engine oil temperature transient is 127 °C for 5 minutes under N1 conditions. Which statement best describes this value?

• A. 125 °C (5 min with N1 at 60±1%)
• B. 126 °C (5 min with N1 at 62±1%)
• C. 127 °C (5 min with N1 at 61±1%)
• D. 128 °C (5 min with N1 at 63±1%)

Answer: (C)

Engine oil temperature transients are recorded as a temperature value tied to a specific duration and a narrow N1 speed band. If you see 127 °C held for 5 minutes, the standard description that matches this exact point is the one that specifies N1 around 61% with a tolerance of ±1%. That band (61±1%) corresponds to the N1 conditions under which a 127 °C transient for 5 minutes occurs. The other options pair different temperatures or different N1 bands, which would describe different measured points and not match this observation.

Engine oil temperature transients are recorded as a temperature value tied to a specific duration and a narrow N1 speed band. If you see 127 °C held for 5 minutes, the standard description that matches this exact point is the one that specifies N1 around 61% with a tolerance of ±1%. That band (61±1%) corresponds to the N1 conditions under which a 127 °C transient for 5 minutes occurs. The other options pair different temperatures or different N1 bands, which would describe different measured points and not match this observation.