3 weeks ago, delivering air and plane was late. We were informed to sheet lates as "X- Other" as reason for being late. I had a total of 6 lates that day and sheeted them as instructed. At 12:30pm, I made a residential delivery. It must have been pretty important because a very pleasant lady was waiting for me. She asked me what time her package was supposed to be delivered by she asks, 12:00pm I replied. What time is it now she asked, 12:30 I replied. What happened she asked and I gave the explanation given me (plane took off, winshield cracked, plane had to turn around) I then informed her as we failed, her delivery is free and informed her to have the sender make a claim. She thanked me and off I went. Yesterday I arrived and got the wrath of god. Supv. was so unreasonable I had to break out my Weingarten card and proceeded to repeat myself 3 times. Supv. wanted to know if in fact I did tell the customer the reason her package was late and if I told to her to make a claim. Can anyone tell me what I did wrong?