DOC AIRBUS | AMM A320FWind Limitations During Engine Ground Operations [CFMB]
TASK 71-00-00-869-003-A
Wind Limitations During Engine Ground Operations
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information
3. Job Set-up
Subtask 71-00-00-869-121-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-869-118-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:24:33 UTC
Wind Limitations During Engine Ground Operations
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
Preferred Wind Direction and Velocity Limitations For Ground OperationsSubtask 71-00-00-869-121-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 71-00-00-869-118-A ** ON A/C NOT FOR ALL
A. Wind limitations during engine ground operations
(1) Static ground operation is restricted to power settings of 70 percent N1 RPM and below with crosswinds exceeding 20 knots or with tailwind of 5 to 10 knots.
(2) Static ground operation is restricted settings of 80 percent N1 RPM and below with crosswinds of 10 to 20 knots or tailwinds of 2 to 5 knots.
(3) Static ground operation is restricted settings of 90 percent N1 RPM and below with crosswinds up to 10 knots or tailwinds up to 2 knots.
In addition to observing these maximum wind velocities, power assurance runs are restricted if wind velocity variation exceeds 5 knots.
(4) Position the airplane to obey the preferred wind direction and wind velocity limits for ground operations.
(5) Tailwinds, or winds with tailwind components, adversely affect ground operation of engines.
(7) At power settings of approximately 90 percent N1 RPM an above, tailwinds can cause a fan tip stall. The onset of fan tip stall during stable engine operation can be identified by the following conditions:
(a) The N1 speed (RPM) increases quickly.
(b) The airplane vibration increases.
(c) You can hear a pulsating or a blowtorch type of sound that continuously starts and stops.
(1) Static ground operation is restricted to power settings of 70 percent N1 RPM and below with crosswinds exceeding 20 knots or with tailwind of 5 to 10 knots.
(2) Static ground operation is restricted settings of 80 percent N1 RPM and below with crosswinds of 10 to 20 knots or tailwinds of 2 to 5 knots.
(3) Static ground operation is restricted settings of 90 percent N1 RPM and below with crosswinds up to 10 knots or tailwinds up to 2 knots.
In addition to observing these maximum wind velocities, power assurance runs are restricted if wind velocity variation exceeds 5 knots.
(4) Position the airplane to obey the preferred wind direction and wind velocity limits for ground operations.
(5) Tailwinds, or winds with tailwind components, adversely affect ground operation of engines.
NOTE: ECU logic may prevent engine start with high tailwind.
(6) During starting, and at idle or low power settings, tailwinds can cause excessive EGT values. (7) At power settings of approximately 90 percent N1 RPM an above, tailwinds can cause a fan tip stall. The onset of fan tip stall during stable engine operation can be identified by the following conditions:
(a) The N1 speed (RPM) increases quickly.
(b) The airplane vibration increases.
(c) You can hear a pulsating or a blowtorch type of sound that continuously starts and stops.
NOTE: Whenever a fan tip stall is imminent or has occurred, rapid retardation of the thrust lever will prevent or permit recovery from the stall.
(8) Obey the cowl limitations during ground operations.