Solution 

Oil Pressure gradually reads high while electric fuel pump is operating.  (Full scale deflection >10bar) 

The oil pressure reading recovers to normal when the fuel pump is switched on and off several times.

 

The  final solution to this was one of two possibilities.  Firstly during the annual, the earthing connections from the engine were cleaned and re-seated.  Secondly, the oil pressure sender was replaced with a new one.

Flap lever locking button will not come out while setting the flaps to the up position. 

According to the maintenance manual this will be due to the rigging of the flaps.  However, independent engineers have found there is another cause. 

 

If you have this issue and would like help, please contact the webmaster, who can advise of the engineers who can solve this issue. 

In need of replacement cockpit trim screws? 

Marshall-Slingsby have run out of spare cockpit trim screws (for which they charge £2.50+VAT each).  These trim screws are a special order from a company in California (Stake Fastners) and the minimum order value is £100 for 200 units (and 4 week lead time).  Should enough owners want spares, we can arrange for an order.  Please contact the webmaster.

Mandatory Modification M919 parts. 

Having completed Mandatory Modification M919 - Floor reinforcement in the area of the left rudder pedals.  Spare materials remain (glass cloth, resin, hardner) from the completion of the modifcation on the webmaster's aircraft.  Anyone wishing to purchase the remaining materials may contact the webmaster. 

Throttle will not reduce below 1500RPM 

This may be due to the throttle cable sleve end detaching at the point at which the cable joins the solid rod end.  Some aircraft have a temporary addition of some locking wire around the join holding the join together. 

 

The only long term solution to this would be to replace the cable assembly.  It is understood that this is a common occurance.  Throttle cables are manufactured by a USA based company to the specific design, they can be sourced from Marshall-Slingsby.

Canopy lock - Key will not turn. 

This may be due to the plastic weather guard surrounding the lock openeing becoming distorted, thereby preventing the key from entering the lock fully.  This is often due to the small retaining screws which hold the guard in place being slightly too tight.  

 

This issue can be checked by removing the screws and plastic weather guard and trying the lock again.  If the lock works, the problem is caused by the plastic guard. 

 

Ensure the opening in the plastic weather guard is slightly larger than the key, all the way to the shoulder of the key.  If not, a sharp knife could remove the excess inside the plastic weather guard slot. 

Alternator Switch or Master Switch not functioning. 

This may be due to a small amount of grit which has found its way between the contacts.  The cost of the replacement switch is approx £85 from Slingsby. 

 

This may be solved on the Alternator switch by changing to use the redundant contacts on the other side of the switch. 

 

Alternatively, using an air duster (designed for cleaning IT equipment) and blasting out any debris from the inside of the switch. 

Military Yellow Colour 

The ex-RAF aircraft sporting the yellow and black colour scheme, may need touching up from time to time.  The yellow colour specification is:

Golden Yellow colour spec BS381C/356, supplied by Courtalds the paint type is Gloss Polyurathane Pt No CA 40000.  Turners Trade Paints Ltd can supply the paint in aerosol format at £8 per can and £10 delivery.