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clearance minimise noise disturbance by the use of continuous descent and low power, low
drag operating procedures (referred to in Detailed Procedures for descent clearance in AD 2-
EGKK-1-17 of the UK AIP). Where the use of these procedures is not practicable, the
aircraft shall maintain as high an altitude as possible. In addition, when descending on initial
approach, including the closing heading, and on intermediate and final approach, thrust
reductions should be achieved where possible by maintaining a ‘clean’ aircraft configuration
and by landing with reduced flap, provided that in all the circumstances of the flight this is
consistent with safe operation of the aircraft
AIRPORT CURFEWS
NOTE: Following an extensive consultation about proposed changes to the Night Flying
Restrictions at London Airports (the "QC system"), the UK Secretary of State, Department
for Transport has taken the following main decisions. They are applicable from 30 October
2006:
- The QC system as such has proven efficient and will be retained. The noise certification
levels remain the basis for the QC classification.
- The definition of night (23:00 to 07:00) and night quota period (23:30 to 6:00) are
maintained.
- The 9 EPNdB adjustment for arrivals is maintained.
- The exempt category is no longer determined by weight, but by noise levels (aircraft below
84 EPNdB are exempt from night restrictions).
- The QC/0.25 band is 84 to 86.9 EPNdB. Aircraft in this category account for 0.25 in the
overall night quota (around 30 at LHR).
- QC/4 classified aircraft are subject to a scheduling ban within the night quota period
(23:30 to 6:00). This is not an operating ban and would permit aircraft movements within
this period exceptionally, when aircraft are severely delayed.
Furthermore, the objective is to progressively encourage the use of quieter aircraft (day and
night for LHR and LGW; night only for STN), i .e. a progressive decrease in the overall
night quota per season over the next years.
Current Notam Supplement SUP: 006/2011 - March 24, 2011
29 October 2006 through Summer 2012 - Movement Limits and Noise Quota
Airport Charges from 1 April 2011-2012, revised 26 July 2011
Certification noise levels (EPNLs) are used for determining the QC category.
Takeoff = (Takeoff+Sideline)/2 for Chapter 3 or
((Takeoff+Sideline)/2)+1.75 for Chapter 2
Approach = Approach - 9
Certificated Noise Level (EPNdB) Quota Count
Greater than 101.9 16
99-101.9 8
96-98.9 4
93-95.9 2