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Level Restrictions - Amendment to ICAO PANS-ATM

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Category: Safety Alert Safety Alerts
Content source: EUROCONTROL Safety Alerts EUROCONTROL
Content control: EUROCONTROL EUROCONTROL

Safety Warning Message

Level Restrictions - Amendment to ICAO PANS-ATM

Date: 26 October 2007 Safety Warning Message.gif

Amendment to ICAO Doc 4444: PANS-ATM

  • There was a potential for unintended level deviations due to flight crews and controllers interpreting the continued validity of level restrictions differently.
  • To ensure an unambiguous understanding of the PANS-ATM provisions pertaining to the validity/applicability of level restrictions, new procedures (ref.: PANS-ATM paragraphs 6.3.2.4, 6.5.2.4, 11.4.2.6.2.5 and Chapter 12) were developed.
  • Some elements of the procedures are outlined below.

Climb Above Level Published in SID

When given a clearance to a level higher than that specified in a SID or initially cleared, follow the published profile unless restrictions are specifically cancelled. Example of phraseology to cancel level restrictions could be:

First transmission
“CLIMB TO 6 000 FEET KODAP 1 DEPARTURE”
Second transmission
“CLIMB TO FL 210 LEVEL RESTRICTIONS KODAP 1 DEPARTURE CANCELLED”.

Descent Below Level Published in STAR

Follow the published vertical profile of the STAR unless specifically cancelled by ATC and always apply minimum levels based on terrain clearance. Example of phraseology to cancel level restrictions could be:

“DESCEND TO 5000 FT LEVEL RESTRICTIONS KODAP 1 ARRIVAL CANCELLED”.

Level Restriction Issued Explicitly by ATC

In all cases, level restrictions issued explicitly by ATC in air-ground communications shall be repeated by ATC in conjunction with subsequent level clearances in order for such level restrictions to remain in effect. Example of phraseology which would have the effect of cancelling level restrictions could be:

First transmission
“CLIMB TO FL 210 CROSS ALPHA AT FL 100 OR BELOW”
Second transmission
“CLIMB TO FL 250”

References

  • ICAO Doc 4444: PANS-ATM, Amendment 5.

Disclaimer

© European Organisation for Safety of Air Navigation (EUROCONTROL) October 2007. This alert is published by EUROCONTROL for information purposes. It may be copied in whole or in part, provided that EUROCONTROL is mentioned as the source and to the extent justified by the non-commercial use (not for sale). The information in this document may not be modified without prior written permission from EUROCONTROL. The use of the document is at the user’s sole risk and responsibility. EUROCONTROL expressly disclaim any and all warranties with respect to any content within the alert, express or implied.