Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 7-18
Amendment Nr. 3
Date: July 22, 1998
A4011121_B23.doc
Doc. No. A40-11-121
7.4.8.1 Cowling-fire protective painting
Check condition of the white fire protective painting. Repair if necessary. If signs of excessive overheating are
found or in case of doubt contact the manufacturer.
Repair of the fire protective painting (observe manufacturer instructions):
Completely polish off the damaged painting
apply three coats of the fire protective painting. Minimum grammage 300 g/m² / 0.06 lb/ft²
cover with one coat of the clear varnish.
Specification of fire protective painting:
see section 3.4.8
7.4.8.2 Fire protective sleeves
The fire protective sleeves must be checked for condition and complete cover of the fluid lines. Check
routing, specially for kinks in fire protective sleeves, which might obstruct fluid flow in fluid lines covered.
7.4.8.3 Fire wall
Check condition (deformation, cracks) of firewall sheets, their connection to each other and to the central
steel frame. Check sheathing edges and renew if required. Look for chafing from fire wall edges on fuselage
steel frame, cables, hoses etc. Check fastening of penetration fittings of oil lines.
7.4.9 Cowlings
System Description
See section 3.4.9
Camlock Fittings, General
Check condition, tight fit and function of camlock fasteners on upper centre fuselage fairing and engine
cowlings. Check tight connection of camlock fittings in the composite structure of fairing/cowling and counter
parts in fuselage.
Upper Centre Fuselage Fairing
Check condition and proper fit of the upper fuselage fairing. Check condition, function and tight attachment of
oil service access.
Engine cowlings
Check condition and proper fit of the LH and RH and lower engine cowlings. Check condition of air ducts and
proper fit to oil cooler, intercooler, radiator. Check fit and sealing to composite sealing plate of air induction
and rubber sealing on coupling sheet of cylinder shank cooling air hose. Look for marks from chafing
between ducts and engine components or firewall.
Cowl Flaps
Check condition and fit of inlet and outlet cowl flaps. Grease hinge bolts of outlet cowl flap (observe section
6.5). Check cable lines and connections to flaps. Check function of inlet and outlet cowl flaps when operating
dome handle and cowl flap reduction handle. Specially observe if flaps are fully opened by springs. Check
fairing section aft of outlet cowl flap for condition, attachment and sealing to fire-wall.
Check if flaps close properly if dome is closed. Check apertures of inlet cowl flaps corresponding to cowl flap
handle positions "Open" and "Closed" (5th notch) with propeller dome open and locked.
Inlet cowl flap apertures, measured from leading edge of flap to cowling:
fully opened:
12 ± 0.5 cm / 4.7
±
0.2 in.
fully reduced opening (fifth notch)
3 ± 0.5 cm / 1.2
±
0.2 in.
