The engine operating limits are as follows:
| Speed, Temperature and Time Limits (RB211-535E4) |
|||||
|---|---|---|---|---|---|
| Operating Condition | N1 | N2 | N3 | Max EGT | Time Limit |
| Ground Start | - | - | - | 570°C | Momentary |
| Max Cont (Amber Band) |
108.4 | 98.0 | 95.8 | 795°C | Unrestricted |
| Takeoff (Red Line) |
108.8 | 100.3 | 99.0 | 850°C 877°C |
5 mins 10 mins |
| Max Overspeed | 110.0 | 101.3 | 100.2 | - | 20 sec |
| Max Overtemp | - | - | - | 870°C 897°C |
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Boeing Maintenance Manual