1.   For many large airlines, records of such difficulty reports can be measured by the foot.

2.   Service difficulty reports, which airlines file with the FAA after mishaps like a loss of cabin pressure, are often construed as signs of trouble.

3.   The so-called service difficulty reports, however, are not always filed.

4.   The service difficulty reports, which log routine maintenance issues serious enough to be reported to the FAA, include a variety of problems that were corrected.

5.   He said officials had faced difficulty gathering reports on the situation in the isolated area, which has many villages only reachable on foot.