There seems to be a typo in the apparatus of NA28 in Eph. 4:19 where P99 is cited for the reading απηλπικοτες when it appears P49 should be cited.

Matthew,
Thank you for your input. I checked images of P49 and because it is fragmented, at best all I can see is απηλ.  I check other published transcriptions and I found that the gamma is always in brackets and the following eta is either under-dotted or in brackets as well.  P99, however, is legible and does read as it is cited in the NA. The CNTMS has images of P99 (see line 12 for -πικοτες  http://www.csntm.org/manuscript/zoomify/GA_P99?image=P99_010-013a_k1.jpg&page=4#viewer).

Ahh, my mistake, I see that now. I didn't think that P49 actually attested it, but I didn't check the CSNTM images for P99.