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Slingsby Firefly T67B

The T67B variant was the first of the series to be constructed from Glass Reinforced Plastic (GRP).  It is a relatively low powered machine, fitted with a 116hp engine and a fixed pitch propeller.  It has a few limitations due to weight and balance.
 

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Problems Encountered - Some with possible solutions 
Symptom
Solution 
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. 
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.