Defects Flashcards
What are the different categories of defects?
- Defects that are Pilot Discrepancies/ Maintenance Discrepancies
- Major Defects
- Not an Airworthiness Defect
- Deferred Defects
- Defects that are Permissible Unserviceabilities
What is a discrepancy?
A discrepancy is an aircraft fault, defect or unserviceability that indicates to a pilot or engineer that an aircraft does not demonstrate normal characteristics of operation or configuration
What are major defects?
Defects that are found on an aircraft as a result of an Airworthiness Directive Inspection or defects that are found by a pilot or engineer that are considered to adversely affect the airworthiness or safety of the aircraft and need correction before further flight.”
What are some examples of major defects?
- Fires & False Fire Warnings during Flight
- Smoke or Noxious Fumes inside the aircraft
- Unscheduled Engine Shut Down
- Fuel System Malfunction
- Significant contamination or leakage of fuel, oil or other fluids
- Use of incorrect Fuel
- Landing Gear Failures
- Brake System Defects
- Malfunction, stiffness or slackness or limited range of control movement
- Significant failure of Instruments,Electrical, Hydraulic, Radio or Nav Systems or Emergency Equipment
- Uncontrollable Cabin Pressure
- Cracks, Major Damage or Corrosion in the primary structure
- Any malfunction to a system which has safety implications
- Any Defect found as a result of an Airworthiness Directive
- Los of any part of an aircraft or failures in digital based equipment
What are minor defects?
Defects which are considered Minor and which do not affect Safety are often referred to as ‘NAD. Not an airworthiness defect”. Their repair may therefore be deferred provided that a certified Engineer working on the aircraft agrees to the deferral.
What are deferred defects?
Deferred Defects are unrectified defects, which are either minor or can be considered to be permissible unserviceabilities. The aircraft may be allowed to fly safely without the defect being repaired
What is a pilot discrepancy?
A Pilot Discrepancy is an aircraft fault or defect observed by the pilot that indicates that the aircraft being operated is not performing normally
What is a maintenance discrepancy?
A Maintenance Discrepancy is an aircraft fault or defect observed or reported to the maintenance engineer that indicates that the airframe, engine or systems of that aircraft are damaged , or they are not performing normally or are in need of repair.
What is the Configuration Deviation List (CDL)
The CDL provides operational limitations for an aircraft to operate when secondary structure is damaged or absent.
What is a permissible damage on the CDL?
Damage to flaps
Damage to ailerons/elevators /rudders
Damage to engine controls
Damage to access panels
What is the MEL?
The MEL (Minimum equipment list) provides approval for an aircraft to operate when certain systems or parts of systems are inoperative (permissible unservicabilities)
What is the PUA?
The PUA allows the aircraft to operate when certain systems or parts of systems which are not covered by an MEL/CDL statement are inoperative. The approval must be granted by CASA or its representative
What is an AD?
Airworthiness Directive.
Notification to owners and operators of certified aircraft that a known safety deficiency with a particular model of aircraft, engine, avionics or other system exists and must be corrected.
• that the aircraft may have an unsafe condition, or
• that the aircraft may not be in conformity with its basis of certification or of other conditions that affect the aircraft’s airworthiness, or
• that there are mandatory actions that must be carried out to ensure continued safe operation, or
• that, in some urgent cases, the aircraft must not be flown until a corrective action plan is designed and carried out.
What are the two categories of AD?
- Those of an emergency nature requiring immediate compliance prior to further flight, and
- Those of a less urgent nature requiring compliance within a specified period of time.
Which CASR relate to AD?
CASR 39
