Brunei DCA CPL(A) Performance study guide
Brunei DCA CPL(A) Performance · Work through your exam, one topic at a time.
The Performance paper is one of the technical knowledge subjects a candidate must pass to obtain a Commercial Pilot Licence (Aeroplane) issued by Brunei Darussalam's Department of Civil Aviation. It is aimed at pilots progressing from the private licence towards commercial privileges, and at licence holders converting or adding a type rating who need to demonstrate competence in aeroplane performance. The Brunei DCA CPL(A) Performance study guide has 9 sections and about 3,000 words.
01Aeroplane Performance Legislation, Definitions and Terminology
Brunei DCA certification and operations rules mirror the ICAO Annex 6 and EASA/CS-23 performance framework. A CPL candidate must know that performance requirements are prescriptive (the operator must be able to show compliance before every flight) and are expressed as scheduled performance, not demonstrated best effort.
344 words, about 2 min02Atmospheric Physics and the International Standard Atmosphere
All flight manual charts are built on the International Standard Atmosphere , so a candidate must be fluent in its constants and in how real atmospheres deviate. ISA sea level: 1013.25 hPa, 15 °C, density 1.225 kg/m³, temperature lapse 1.98 °C per 1,000 ft up to 36,090 ft (tropopause, −56.5 °C), then isothermal.
353 words, about 2 min03Take-off Performance: Field Length, Obstacle and Climb-Limited Cases
Take-off performance is the most restrictive of three cases. Field length : TODR must not exceed TODA and ASDR must not exceed ASDA; for a dry runway the aeroplane must reach 35 ft by the end of TODA with one engine failed at V1.
344 words, about 2 min04Landing Performance and Landing Distance Requirements
Landing performance requires that the landing distance required (LDR) does not exceed the landing distance available (LDA) . LDR is measured from the 50 ft screen to a full stop, factored (typically ×1.67 for a dry runway, ×1.92 for wet/contaminated in older rules; modern CS-25 uses 1.15 on a dry runway with reverse thrust accountability and 1.43 on a wet runway).
311 words, about 2 min05Climb, Cruise, Descent and En-route Performance
En-route climb requirements depend on the number of engines: the net gradient must be at least 1.2% for twins, 1.5% for three, 1.7% for four in the second segment configuration, and 1.2%/1.5%/1.7% respectively in the en-route configuration at 1,500 ft. Ceiling definitions matter: absolute ceiling (zero rate of climb), service ceiling (100 ft/min for twins, 500 ft/min for others), single-engine absolute ceiling and drift-down height.
358 words, about 2 min06Weight and Balance and Its Effect on Performance
Every performance number is mass-dependent. Take-off distance scales roughly with the square of mass; climb gradient scales inversely with mass.
297 words, about 1 min07Runway Surface, Slope, Wind and Contamination Effects
Runway surface condition changes the friction coefficient and therefore accelerate-stop and landing distances. Dry concrete gives the best braking; wet, slush, snow and ice degrade it progressively.
321 words, about 2 min08Use and Interpretation of the Aeroplane Flight Manual and Performance Charts
The Aeroplane Flight Manual is the approved document; the POH may be a manufacturer's document with equivalent data. Performance data in the AFM is scheduled (conservative) and must be used as published.
327 words, about 2 min09Hot, High and Humid Operations and Density Altitude
Hot, high and humid conditions all reduce air density, and therefore lift, thrust and propeller efficiency . The result is longer take-off and landing distances, reduced climb gradients, higher true airspeed for the same IAS, longer ground roll and a lower single-engine ceiling.
345 words, about 2 min