Q:- What are Signal Defect Code List??
Ans:- 'S' -- Signal Department
S.M. Signal Maintenance inefficient
S.E. Signal equipment - Defective design, manufacture or excessive wear
S.I. Signal Installation incorrect.
S.O. Signal...
more...

- other failures.
'O' -- Operating Department
O.W. Operating -- Wrong Manipulation
O.T. Operating -- Token Exhausted
O.P. Operating -- Points obstructed.
O.L. Operating -- Lighting Improper
O.H. Operating -- Hanging Coupling etc.
O.I. Operating -- Information not given.
O.N. Operating -- No Fault Found.
O.O. Operating -- Other Failures
'R' -- Running Department
R.C. Running -- Cinder dropped in unauthorised places
R.M. Running -- Missed Token
R.O. Running -- Other Failures
'E' -- Engineering Department
E.C. Engineering -- Creep
E.D. Engineering -- Drainage Inadequate
E.S. Engineering -- Staff Working
E.P. Engineering -- Packing
E.T. Engineering -- Trolley Uninsulated
E.O. Engineering -- Other acts of employees of this department
'L' -- Electrical Department
L.P. Electrical -- Power supply failure
L.F. Electrical -- Fluctuation in voltage
L.O. Electrical -- Other acts of the employees of this department.
'P' -- Posts and Telegraph Department
P.T. P&T -- Theft of Line Wire.
P.C. P&T -- Contact on Line
P.B. P&T -- Break on Line
P.E. P&T -- Earth on Line
P.P. P&T -- party working on Line
P.I. P&T -- Insulation Imperfect
P.L. P&T -- Leakage of extraneous current
P.O. P&T -- Other acts of employees of this Department.
'M' -- Miscreants
M.T. Thefts
M.D. Damages
M.I. Interference
'X' -- Other Classification
X.W Weather extremes like storms etc.
X.X. Unknown, cause not established
X.F. Fire