BOEING 737
MAINTENANCE MANUAL
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CHAPTER 10
PARKING AND MOORING
Subject TABLE OF CONTENTS Subject No.
PARKING
NORMAL PARKING.................................................................................................... Maintenance Practices 10-11-0
PROLONGED PARKING............................................................................................ Maintenance Practices 10-12-0
HIGH WIND CONDITIONS PARKING........................................................................ Maintenance Practices 10-13-0
MOORING ...................................................................................................................... Maintenance Practices 10-20-0
HIGH WIND CONDITIONS MOORING ................................................................... Maintenance Practices 10-21-0
505
Feb 20/87 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Contents 10 Page 1
NORMAL PARKING
1. General
A. The airplane is normally parked for short periods with chocks in front of and behind at least one main gear wheel, and with parking brakes off. The parking brake is used to hold the airplane until chocks are in place. Openings in the airplane structure such as vents and scoops shall be covered or plugged to keep out weather and foreign matter. Should very high winds be expected, refer to 10-21-0, High Wind Conditions, Mooring. For special procedures to park the airplane for engine operation refer to 71-09-100/201.
B. A static ground on the airplane is not necessary when the airplane is parked or is serviced during the turnaround operation. This does not include when the maintenance steps given below are done (Ref chapter 20-40-11).
(1)
A static ground on the airplane is not necessary when you pressure refuel the airplane. An electrical bond between the airplane and the refuel vehicle is recommended.
(2)
A static ground of the airplane when you fuel over the wing is recommended.
(3)
Do a static ground of the airplane when you do maintenance procedures. Do this when you use devices such as lights, power tools, and instruments powered from external cords that are attached to grounded electrical power sources.
C. Pitot probe covers and static port covers are recommended when the airplane is parked for more than a standard turnaround.
D. Failure to remove covers from pitot probes or coverings from static ports before flight may cause large errors in airspeed-sensing and altitude-sensing signals, which may lead to loss of safe flight.
E. A minimum distance of 15 feet should be maintained between airplanes being towed or parked to give adequate turning clearances (Fig. 201). If engine operation is anticipated, refer to Fig. 202 to ensure airplanes, maintenance personnel and equipment, and buildings, adequate protection from jet blast and heat at breakaway from standstill. Various thrust settings that will be required for breakaway from standstill are governed by airplane position, type of area, and surface conditions. A high initial thrust setting is required to start airplane movement. The setting is then reduced to idle, or slightly above, to continue the maneuver.
WARNING: DO NOT CROSS ENGINE EXHAUST AREA DURING ENGINE RUN-UP OR TAXIING. BE SURE AREAS IN FRONT OF ENGINES ARE CLEAR BEFORE ENGINE RUN-UP.
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