B. If airplane is parked for turnaround flight, static electrical grounding is not necessary if no maintenance is to be done on the airplane.
C. During pressure refueling the airplane, do the following:
(1)
Static grounding is not necessary only when Ref Par. 4., check has been passed.
(2)
Electrical bond between the airplane and the refueling vehicle is recommended.
D. A static ground of the airplane when you fuel over wing refueling is recommended.
E. Statically ground the airplane when performing maintenance task using following devices.
(1)
Power Tools
(2)
Electrical Power Sources
(3)
Lights
(4)
Powered Instruments
F. When static grounding is recommended in a detailed procedure, the airplane must be statically grounded to a common, approved, identified ground. Where a grid system is used, any number of individual grounds will provide a common ground, since all grounds are interconnected. If an area does not have a grid system, a single approved and identified ground must be used as the common ground for all grounding cables used.
G. Stop ground servicing operations, external to the airplane, during electrical storms.
H. Electrostatic Grounding - Parked Airplane
(1) The airplane is normally electrostatically grounded through conductive tires. (AMM Procedure for measuring electrical resistance to ground.)
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(2) If needed to prevent static electrical discharge shocks to attending personnel or passengers.
(a)
Airplanes having inadequate conductivity to ground through the tires.
(b)
Airplanes parked on a surface where the parking site conductivity is inadequate to carry away static electrical charge, should be electrostatically grounded to an identified ground point.
NOTE: The operator should ensure the adequacy of airplane and
____ parking area conductivity and may need to establish local procedures in areas where inadequate parking site conductivity is seasonal or permanent. Parking site conductivity may be inadequate on dry snow, dry sand or in areas of low moisture.
I. Should operators elect not to follow this recommended procedure, they should develop alternate procedures or establish conditions adequately protecting the personnel and equipment involved. Local fire codes and customs may require alternative or additional procedures to those defined here.
J. When the airplane is on the jacks and grounding cables interfere use this location.
(1) A different grounding location is through the unpainted bolt head common to the jack pad fittings found at STA 995, WL 116, LBL 130 and RBL 130 (AMM 32-32-00 and 32-34-00 A/T).
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2. Static Ground Procedure (Fig. 201)_______________________
A. Access
(1) Location Zones
711 Nose Landing Gear
731 Left Main Landing Gear
741 Right Main Landing Gear
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B. Grounding procedure:
S 422-032
WARNING: DO NOT CONNECT A HEADSET AND DO NOT TOUCH CONNECTIONS TO THE
_______ AIRPLANE DURING ATMOSPHERIC ELECTRICAL ACTIVITY OR IN STRONG ELECTROMAGNETIC FIELDS. LIGHTNING STRIKE AND HIGH DISCHARGE CURRENTS CAN CAUSE SEVERE INJURY.
ALWAYS ATTACH THE GROUNDING CABLE TO THE GROUND CONNECTION FIRST. NEVER ATTACH THE CABLE TO THE AIRPLANE AND THEN TO THE GROUND CONNECTION.
CAUTION: ATTACH GROUNDING CABLES ONLY TO SPECIFIED POINTS ON THE
_______ AIRPLANE. INCORRECTLY ATTACHED GROUNDING CABLES CAN CAUSE SCRATCHES WHICH CAN CAUSE CORROSION AND CRACKS ON STRESSED PARTS. GROUND WIRES ATTACHED TO DOORS OR FAIRINGS MADE FROM COMPOSITE MATERIALS DO NOT PROVIDE A GROUND.
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