PRO-NOR-SRP-01-50 P 25/28
In note below the PERF page illustration:
Note: 1.The default TRANS FL value is computed by the FMS based on: ‐ The Transition Altitude of the destination airport (extracted from the NAV Database), ‐ The QNH value entered on PERF APPR page. Due to the internal FMS computation of altitude constraints, it is rounded to the upper multiple of 5. The crew should not modify this default TRANS FL value, if it slightly differs from the Transition Level specified on the approach chart or reported by ATC.
In some cases perhaps changing the TL will make FMS skipp certain altitude constraints in data base procedures?
For Transition Altitude (PERF page for take off) on page PRO-NOR-SRP-01-10 P 42/50 the FCOM STATES
CHECK/MODIFY the TRANS ALT (transition altitude)
In other words, different procedure for TA and TL.
CP