0000950134-01-502024 10-Q 1 20010331 20010515 PETROLEUM HELICOPTERS INC 0000350403 4522 720395707 LA 1231 10-Q 34 000-09827 1639491 2121 AIRLINE DRIVE SUITE 400 P O BOX 578 METAIRIE LA 70001-5979 5048283323 113 BORMAN DRIVE LAFAYETTE LA 70508 10-Q 1 d87219e10-q.txt FORM 10-Q FOR QUARTER ENDED MARCH 31, 2001