DOCUMENT 1136
REV. G
Instruction Manual
Pro APF Series LED
ICAO TCL, IHP, & STP
7
8.5
Heico-Lock Installation Guidelines
Step 1: Hand tighten to ensure that 2-3 threads extend beyond the nut on through-bolt applications.
Step 2: Tighten each bolt to one-third of the final required torque following the pattern as shown below.
Step 3: Increase the torque to two-thirds following the pattern shown below.
Step 4: Increase the torque to full torque following the pattern shown below.
Step 5: Perform one final pass on each bolt working clockwise from bolt 1, at the full final torque.
9 Maintenance
The preferred method of maintaining a light unit is to periodically and systematically replace the unit and
return it to the maintenance shop for renovation. As an alternative, the light unit can be serviced in the
field. However, it is recommended that field servicing be limited to bolt torque checks per section 9.10.4
and cleaning the lens as described in section 9.1. For extensive field service, refer to sections 9 and 10 for
instructions and spare parts kits.
IMPORTANT:
IMPORTANT
Do not open any light unit unless the warranty period has expired.
Opening a light unit will void the warranty
9.1 Cleaning Lenses
With a compressed air blast or suitable brushes, remove all accumulated debris from the light channel.
Clean the outer surface of the prism with a detergent solution. If the lens is coated with a substance
impervious to the detergent, a suitable solvent should be sparingly applied with a wad of cotton or a patch
of cloth on the end of a wood splint. After the solvent has acted the remaining solvent and softened coating
should be removed with a clean piece of cotton or cloth. Care
should be taken to avoid excessive contact
between the solvent and the lens seal. Remove all remaining solvent from lens and seal. A gentle air blast
may be used.
9.2 Light Module Replacement
