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
Inspection on wing trailing edge

Luff line attachment webbing – inspection
Warp Drive PropellersSpecial inspections - Warp Drive 'standard hub'
Fuel tubingFlexible fuel tubing (PVC)
Cougar
Garland Skytrike
Gemini
Lancaster
Microtrike 440
Panther
Puma 
Puma 440
Tri-flyer
Tri-flyer 440
Willow











Upper torso restraint
Purolator
Purolator in-line fuel filters
Trelleborg Hydro K Hoses
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
Replacement of flywheel hub washer part no. 944072
912 UL/ULS & 914UL
Crankshaft inspection
912 UL/ULS
Oil pump & attachment bolts inspection
912 UL/ULS
Fuel pump – pressure side fuel hose replacement
912 UL/ULS & 914UL
Cylinder head inspection / replacement
912 UL/ULS & 914UL
Cylinder head inspection / replacement, Engine Re-identification
912 UL/ULS & 914UL
Valve Push Rod Assembly – Inspection / Replacement
912iS & 912iS SportIgnition Housing Sealing Plugs - Inspection
914UL & 915iS 
2019-001-E
Exchange of exhaust valves
912iS, 912iS Sport & 915iS
Inspection and/or Replacement of Fuel Pump Assembly







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