Mandatory Permit Directives

Civil Aviation Authority Mandatory Permit Directives summarise mandatory actions that must be complied with by UK Owners and Operators of Permit to Fly aircraft. 

If you wish to see MPDs for each airframe type, please navigate to the appropriate Aircraft Datasheet (TADS or HADS).

MISCELLANEOUS





TypeMPD No.Description
Q1 & Q2 Wings
1995-017
Inspection on wing trailing edge

2016-008-E
Luff line attachment webbing – inspection
Warp Drive Propellers
1995-103
Special inspections - Warp Drive 'standard hub'
Fuel tubing
1998-019 R1
Flexible fuel tubing (PVC)
Cougar
Garland Skytrike
Gemini
Lancaster
Microtrike 440
Panther
Puma 
Puma 440
Tri-flyer
Tri-flyer 440
Willow





2001-009






Upper torso restraint
Purolator
2008-004
Purolator in-line fuel filters
Trelleborg Hydro K Hoses
2010-001
Inspection / replacement of cracked hoses
Ballistic Parachute Recovery System (BPRS)
2019-005Placarding Requirements for Aircraft fitted with a BPRS (for more info see TIL063)



POWERPLANTS




Type
MPD No.
Description
912 UL/ULS
2007-003 R2
Fuel pump replacement
912 UL/ULS & 914UL
2011-003-E
Replacement of flywheel hub washer part no. 944072
912 UL/ULS & 914UL
2011-009-E R1
Crankshaft inspection
912 UL/ULS
2012-001-E
Oil pump & attachment bolts inspection
912 UL/ULS
2012-002-E
Fuel pump – pressure side fuel hose replacement
912 UL/ULS & 914UL
2013-003-E
Cylinder head inspection / replacement
912 UL/ULS & 914UL
2017-001
Cylinder head inspection / replacement, Engine Re-identification
912 UL/ULS & 914UL
2018-001
Valve Push Rod Assembly – Inspection / Replacement
912iS & 912iS Sport
2017-005-E
Ignition Housing Sealing Plugs - Inspection
914UL & 915iS 
2019-001-E
Exchange of exhaust valves
912iS, 912iS Sport & 915iS
2019-006-E
Inspection and/or Replacement of Fuel Pump Assembly
912 UL/ULS, 914UL & 912iS Sport 
2023-002-EPropeller Gearbox Magnetic Plug – Inspection / Propeller Shaft Replacement
912 iS, 915iS and 916iS 
2025-001-E

Engine / Electrical Power – Internal Generator – Inspection / Replacement of Oil Spray Nozzle 

If you need any further help please contact the Technical Office for advice on 01869 336006