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When the aircraft is de-iced at a remote pad at CLE, DEN, EWR, or IAH, the mechanic performing the clear ice inspection will inform the communication center that the aircraft is clear of snow, ice and frost, and provide their employee number. The communication center will notify the flight crew prior to departure that the clear ice inspection was completed, the aircraft is safe for flight, and provide the employee number of the person performing the inspection. The flight crew will make the box 24 logbook entry.
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The notification and logbook sign off requirements described above are in addition to any required notifications and logbook sign offs associated with cold weather operations.
Presently there are three methods of conducting the MD-80 upper wing clear ice check. Use the appropriate method described below based on the configuration of the aircraft. Personnel conducting the check should use extreme caution when conducting the inspection to ensue ladder/stand and footwear are free of ice, snow, etc.
WARNING: Make certain that leading edge slats/flaps are fully retracted and that flap/slat handle, located on the control pedestal is in up/ret position to prevent serious injury or damage due to accidental or inadvertent movement of flap/slat handle.
WARNING: Make certain that the auxiliary hydraulic pump switch, located on the First Officer’s main instrument panel, is in the OFF position to prevent serious injury or damage due to accidental or inadvertent application of hydraulic pressure.
1.
Ice Detection Tuft and Triangle Decal Assembly
A physical (hands-on) check may be accomplished by positioning a ladder/stand at the wing leading edge approximately six feet outboard of the fuselage, feeling as much of the upper wing surface, along and aft of the front spar as can safely be reached from the ladder. From the same vantage point, the aft part of the wing is visually checked for the presence of ice. During this check, each cord tuft attached to the triangular decals must be checked for freedom of movement to ensure that they are not embedded in ice. Movement of the tufts can be verified by use of an ice wand. P/N IC-78 (fiberglass pole with rubber tip or equivalent) that is supplied to each station. (If tuft and triangle assemblies are missing refer to inspection requirements described in 3. of this section and MEL/CDL requirements.)
2.
Painted Ice Detection Triangle
A physical (hand-on) check may be accomplished by positioning a ladder/stand at the wing leading edge, approximately six feet outboard of the fuselage, feeling as much of the upper wing surface, along and aft of the front spar, as can safely be reached from the ladder. From the same vantage point, the aft part of the wing is visually checked for the presence of ice. During this check, an ice wand (fiberglass pole with rubber tip or equivalent) is rubbed across the upper third then a final sweep across the lower third of the painted ice detection triangle. The painted ice detection triangle is a pattern of stripes painted on the upper surface of the left and right wings, using a coarse, non-slip black paint. (The non-slip paint is similar to the paint used on the overwing exit walkways.)
When rubbing the ice wand across the painted ice detection triangle, the physical check for wing upper surface ice may be made by assuring that the wing surface is rough where there are black paint stripes, and smooth between the black paint stripes. When the wing surface in the area of the black paint stripes has a consistent texture, either rough or smooth, ice may be present and further check of the upper wing surface is required. Only the rough smooth rough contrast felt with the ice wand indicates that no ice is present. (If portions of the painted ice detection triangle are missing refer to the inspection requirements described in 3. of this section and MEL/CDL requirements.)
3. Critical Ice Detection Tuft and Triangle Assemblies Missing or Painted Ice Detection Triangle Missing
A physical (hands-on) check may be accomplished by positioning a ladder/stand at the wing leading edge near the fuselage, gaining access to the upper wing surface in the vicinity of the overwing exit walkways. Once on the upper wing surface, a tactile check is performed by feeling with your hands, the affected area of the upper wing surface just outboard of the wing tank bulkhead and spanwise just forward of the rear span.
Note: Removal of the overwing exits is not an approved method to gain access to the upper wing surface for the purpose of this check.
Any ice detected must be removed.
Caution: After removal of ice, the wing upper surface must be checked again using the appropriate method described above, to confirm that the area is free of ice.
Caution: Check must be made of wing upper surface at inboard end of wing fuel tank as close to time of departure as possible.
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